Gaming prebuilt price range ~1000

Check your PMs.

are there any shops there which sell pc parts and build them for you for a small sum? is same as buying prebuilt pc but a lot better with quality stuff, room to upgrade and warranty bonus over 3 years

I see. In case you find a trustworthy one and need a build suggestion tell me ^^

for prebuilt ones I would always keep away but hmm (it sucks cause they always use crappy tier 4 or 5 psus barely able to offer what they promise, cheap mainboards which barely support sli/crossfire, cheap quality ram, useless cpu coolers and some of them believe not applying thermal paste correctly might work... and sell the gathered pieces OVERPRICED)

http://www.newegg.com/Product/Product.aspx?Item=N82E16883227504
this looks nice but depends which psu they used in it. hope not some tier 4-5 junk!

good luck!

he means he sent you some private messages with prebuilt pcs I guess.
you can check that high up on right corner at notifications.
I don't see the reason why he did not post the suggestions here though

i5 4670k is the best cpu for gaming you can find on market.
practically i5 4670k and i7 4770k are the same thing.
only difference is that i7 4770k has multi threading enabled and set to 8 threads (another 4 virtual cores which can make the cpu act as a 8 core cpu as long as the 4 main cores don't reach the limit).
i7 4770k is really worth to get only if you are interested in doing some video editing, hard image edit, 3d rendering (3d coat, blender, maya.... and 4d sculpting)
In gaming the only advantage will be maybe 2 fps which is not worth the 100$ and that advantage only in a few rare games.
for gaming you should focus on the gpu. the higher the better.
even fx 8320 (fx 8350 is factory oced 8320 to 4ghz) is very good in gaming and won't bottleneck even sli gtx 780 ti which should allow you get a better graphics unit.
but that depends if they used a good mainboard and psu.

for 1000$ I would check something along the lines:
i5 4670k gtx 770 8gb ram 1600mhz 550w psu at least tier 3.
here psus list:
http://www.eggxpert.com/forums/thread/323050.aspx

or something like
fx 8320 r9 290 8gb ram 1600mhz 550w psu over tier 3

but that's hard to find in prebuilt pcs.
hd 7950 btw should perform about the same as gtx 760.
they are sold expensive now because of bitcoining mania duh..

looks good but gpu is way to weak

that's good.
only drawback is that you cannot oc the cpu but oh well for a prebuilt.
ask them for the psu/ mainboard and ram full name and oem and post here to check if they are worth the coin.
always be informed what you buy

let me get a few things sorted before I take a nap
unlocked cpus aka "k" on a z 87 mainboard can be overclocked later when needed with the help of a good cpu cooler so that performance will increase. worth it to spare you from fast update. i5 4570 will do very well nowadays but in the future at 3.2-3.6 ghz idunno.
i will post tomorrow the gpu hierarchy with other information.

k as promised.

I don't think I need to post anything about cpus.
just check youtube and cpuboss. as mentioned i7 4770k is only meant for multi-threaded stuff (3d rendering, 4d sculpting, video editing, intensive and hard image editing.... and as a matter of fact I would still choose a fx 8350 or i7 4930k any day over the 4770k if mentioned actions are the main factor in the pc buy.)
i5 4670k can do video editing, rendering.... of course but a bit slower but it should be awarded intel gaming cpu.

mainboards - hmm we want to leave that aside until we get a few ones (names) to compare and make some study on them.

cooling.
I wouldn't bother with water cooling if you are not going to skyhigh overclock, cool the gpu as well or utilize an itx, smal matx case. How the radiator is placed and whether it takes fresh air to cool cpu well (sends heat on mainboard and gpu ... to make them cook chicken XD) or takes the heated air from inside and does banana cocojumboooo cooling worser than air cooler.... and water leaks and making the durability of other pieces drop as well as it's own oh duh NO TY WITH PLEASURE! lol skyhigh oc = nitro cooling for the way. just don't drink the nitro like the guys from gpu selling management did and priced the gtx 680 at 600$ wiii
for base and medium oc: cooler master hyper 212 evo does awesome.
high oc : thermalright hr-02 macho and noctua nh-dh14.
well you get prebuilt pc so hmm I would recommend changing the cooler (BUT ONLY IF IT DOES NOT VOID THE WARRANTY WHICH IS 100% A MUST FOR PREBUILT PCS!)
of course intel and amd crapoolers will do well at stock ghz but for me a crapooler is still a crapooler.

PSUS
as mentioned above.
never use something lower than tier 3 psus. you risk pricey pieces like cpu mainboard and gpu to be at the experimental pleasure of the psu.
link with psu tiers:
http://www.eggxpert.com/forums/thread/323050.aspx
want a good review on the psu you own, like? this guy knows his job and I mean it!
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Review_Cat&recatnum=13
lol
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=123
he has humor as well ^^
for any gpu even with oced i7 4770k at 4.5ghz a quality tier 2 or higher psu of 550w is more than enough
works with (gtx 780, r9 290, r9 290x, gtx titan, gtx 780 ti too of course)
2x sli/crossfire any quality 750 - 800w pw is sufficient for above mentioned monsters as well.
dunno about titan black though.
disappointing that my i7 4930k on x79 extreme 6 with gtx 780 ti won't run on any 550w psu (600w minimum only). don't know why. pretentious dumbrig.

gpu hierarchy.
use those websites for gpu comparisons:
http://www.guru3d.com/articles_categories/videocards.html
http://www.game-debate.com/hardware/index.php?list=gfxDesktop
http://gpuboss.com/

so amd goes like this:
r7 250 (19% weaker than) hd 7750 (10% weaker than) r7 250x (4% weaker than) hd 7770 (14% weaker than) r7 260 (10% weaker than) r7 260x (16% weaker than) hd 7850 (16% weaker than) r9 270 (1% weaker than) hd 7870 (7% weaker than) hd 7870 XT and r9 270x (5% weaker than) hd 7950 (17% weaker than) hd 7970 (5% weaker than) hd 7870 ghz (3% weaker than) r9 280x (18% weaker than) r9 290 (9% weaker than r9 290x) and I hate hd 7990 so no cookies for it!
duh borred of making theoretical differences as close as possible to real performance as well.

nvidia:
gt 640 < gtx 650 < gtx 650 ti < gtx 750 < gtx 750 ti < gtx 650 ti boost < gtx 660 < gtx 660 ti < gtx 760 < gtx 670 < gtx 680 < gtx 770 < gtx 780 < gtx titan < gtx 780 ti < gtx titan black
gt 630 and lower are not mentioned cause I don't find any meaning in them existing. I would prefer hd 4600 over them!

I love unique cases used in a few prebuilt pcs.
Hp phoenix case is yummy.
if case is not unique one then check all the reviews on it.

ram ham.
before buy. ask for the oem and selling company name.
ask for the ram's name. ask for the mhz. is the ram xmp safe and does mainboard support that?
check reviews on quality. always dual channel for the way.

errrm anything else or did I just mention the obvious >_>