The PSUs made by Seasonic OEM are usually a bit better than the Corsair CX series. (Seasonic is how Corsair got their good name in PSUs. They make the HX, TX and AX series for corsair) You can still get one of these in your budget with the Antec Neo Eco: http://www.newegg.com/Product/Product.aspx?Item=N82E16817371031
Overclocking normally means the CPU. You will need a 2500K to do that. Newegg lowered it'd price to $224.99 today. I don't know how long it will stay that way but it's $10 cheaper than 2 days ago. Still $35 more than a 2400.
if u are overclocking then u will need a processor with unlocked multiplier or has a k written after it .their are only 3 processor of 1155 socket which are i5 2500k,i7 2600k and i7 2700k.
I7 is an overkill and not in ur budget.get an i5 2500k if u are going to overclock. And buy the mobo the one u suggested.
Note ***for overclocking an aftermarket cooler is absolutely necessary***
if mild to medium overclock then coolers like cm hyper 212+ or evo
and for heavy oc noctua dh14 and cm v10 or corsair h100
If u are not overclocking then i5 2500k is waste money buy i5 2400 and u are not going to need z68 mobo buy this mobo
Its kinda worth the extra $40, its a better board and has crossfire.
The antec neo mentioned above has a extra 8 amps. I know 8 amps is not much, but the corsair at 40 amps vs. the antec 48 amps means crossfire hd-6950's should work in the future if you buy a 2nd one used for cheap later on.
I would also look for used video cards.
A pair of hd-4870's gives you 1600 shaders for cheap.
A pair of 5770's would be ok.
I mean something like $100 to $120 for the pair if you spot some for sale.
A pair of hd-5830's, 5850's, 5870's would be ok too. 4890's..
Thanks for all the input guys. I ended changing the motherboard to the Gigabit GA-Z68AP-D3(R2.0) LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard and the psu to the Antec Neo Eco. My other question would be, what would be better between choosing the go with the i5-2500k with an amd 6870 or the i5-2400 with an amd 6950. I can't afford to get the best of both worlds, so what would be the better bang for buck?
Certain cards are known to suffer more from microstuddering troubles than other cards.
The ones with more disabled shaders tend to have this trouble more than cards with most or all of the gpu's shaders working because each gpu will have different parts disabled so they end up being missmatched in crossfire.
The 6950 has most of its shaders working, so a pair of them is pretty close, they are known to crossfire well.
The 6790, 6850, and 6870 are known to crossfire poorly so this kills your upgrade path.
A 2400 with a 6950 would be faster than a 2500k with a 6870.
The 2500k also needs a aftermarket cooler where the 2400 is ok with the stock cooler.