some opinions in this gaming rig please

ohh can i replaced the 120mm fan that comes with the xigmateck hdt-s1283 and put a blue 120mm led fan?? because i dont like how it looks..
will the temps are going to get higher if i put a led blue fan ????

but the 4870 1 gb is just like $40 more than the 512mb version, and im not using rebates because i dont live in USA and applying the rebates will make it to complicated for me .. but i will considered that thanks
and how about the Xigmateck??

Go with the Cooler Master 690 case, which is $64 cheaper and a good case too. It's shipping for $78!!
Cooler Master 690 without Power Supply - RC-690-KKN1-GP
That would allow you enough to afford whatever GPU that you want.

Why don't you save $165 from the Rampage and get the p45 based mobo, Asus p5q?? If your not going to do a serious X-fire setup, but still want some decent OC'ing the p45 based mobo's will do that quite well. Personally the x48/x38 are enthusiast mobo's and the p45's are more mainstream with a little extra, IMHO. So if your not going to do extreme OC's and aren't worried about a 8x X-fire setup, the p45's are the ticket! Then with the $165 savings you can still keep the key components that you like (q9550, 4870 1gb, Antec 1200, Acer 24" LCD, etc.). I'd still consider the CM 690 case I linked above, but if your set on the Antec 1200 (good case too) than just get it. I'd seriously consider the p45 for the cost benefit, unless your going for extreme's!! The Asus p5E is a good mobo too, so if you want to save the $100 over the Rampage than do it!! Almost any p45, x38, x48 mobo's will work just fine for 99% of builds, so your the one buying and deciding what works best for you.

I'm seeing about a 3.4-3.8 OC speed, depending on RAM, Mobo, & Cooling. The FSB will need to be above 400FSB in order to get over 3.4 ghz, so your memory will need to be able to go above 800mHz (400FSB x2) to go above the 3.4gHz (8.5 multiplier x 400FSB = 3.4 gHz). The Xigmatek is about as good as it gets for the $, IMHO. The LED's on fans really don't add much heat to the equation. The big deal is whether or not they are louder or if they cool more/less than the stock one. If you have time, I'd try both and see if you like one over the other, performance wise.

No problems with your ?'s, that is why we all are here to help each other out!!
If your talking about this RAM:
OCZ Reaper HPC Edition 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Retail
You will need to adjust the memory voltage up to 2.1v to get the said operating speeds of 4-4-4-15. Stock voltage is 1.8v and 99% of mobo's out there allow you some adjustments up to 2.2v usually. If you get the Asus p5E mobo, on page 4-21 of the mobo manual it states that you'll be able to adjust the memory voltage from 1.8v - 2.66v in 0.02v intervals!!! That is one good thing about enthusiast mobo's!! Lots of adjustments!
Normally you don't need too much CPU voltage adjustments when doing mild OC's on CPU's. I'm sure your going to need to make some, but to what extent, I don't know.
The FSB will need to be adjusted to reach your given CPU speed that your looking for. I would thoroughly read your mobo manual before making any adjustments.

ooh i forgot
if i install a win vista ultimate 64 bit service pack 1 will reduce performance??
or should i installed home premium 64 bits , because a friend has 1 license left of a vista ultimate 64 bits with service pack but i think the ultimate will reduce performance ...am i right ?????

yea like when vista first came out people said it was to bad for games . people were having more fps in games with xp than with vista... .

.. lets say with home premium i get 100-105fps in cod4 and with ultimate i get 96-100 fps
do i make myself clear?

i think ill go with ultimate
i just have one question

if i want to Oc my q9550 to 3.8 first i have to change the cpu v core and mmm... lets say to 1.3v and memorya ram to 2.4

then i change the ram 800 mhz (but isnt the bios recognizing the 800mhz???)

and here is what i dont understand
to overclock the memory i just have to change the memory voltage and change to 800mhz...and what if i want to get 1066mhz instead of 800mhz how do i do that?????

then if i want to go to 3.8 i have to change the fsb to 447mhz

so 447 X 8.5 = 3.8ghz

and i think thats how you doi it right??