New gaming build,need final reviews

Get a Z68 board, its better. Get the Asrock Z68 Pro3 for $110. Get Antec ECO 620w for $60 or Corsair CX600 600w for $70. I like WD Cavier blue better and think its faster than Seagate.

I'm assuming you do not want to overclock your CPU?

Also, I recommend getting a SATA II HDD instead.

I don't think i can fit 2500k in my budget...
Why sata II if SATA III is better?

Check out my $600 build here:
http://www.squidoo.com/electronicandmore
That's what I'd suggest to get the best bang for your buck in terms of efficiency. The Pro3 is unnecessary because you won't be able to SLI with 16x/4x and you don't need that quite expensive of a PSU.

i don't need SLI,then which MB can you suggest?
This PSU is 80+ bronze,and i think this is good...what else choices do i have?

Well I'd suggest dropping down to the ASRock H61M/U3S3
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Just a link to show you the product.

And dropping down to something like an Antec Neo Eco 520C just to save some money. The XFX is good no doubt, I just think it's a little expensive, the 520C offers similar performance for a lower price.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

With PSU,i want to have room for later upgrades...but i have to think about another PSU,which is Modular but cheaper at the same time
About Mobo,i want something that later could be upgraded,with PCIe 3.0 and so...

No boards support true PCI 3.0 to start off. You would need an Ivy Bridge chip to do that, which will replace Sandy Bridge, if you want upgradability and SLI etc. The P67 Pro3 was not a very good choice, get the Asrock Extreme3 Gen3 Z68, that'll give you the biggest bang for the buck in terms of upgradability.

As for the PSU, it depends again. Do you plan to SLI or CF? If not the 520C would be perfectly fine, if you do then get something above 650w+ that's efficiency is good.