-By the end of the year, your parts list will likely change significantly.
-From what you listed, I see no way for you to benefit from Z68.
http://www.ukgamingcomputers.co.uk/difference-between-h67-p67-z68-and-h61-chipsets-a-22.html
Z68
Launched 5 months after the P67 and H67 chipset the Z68 chipset combines the advantages of the H67 and P67 Chipset so that overclocking, dual dedicated graphics cards and use of the integrated CPU graphics is available. Whilst on the surface it would seem that this would be the chipset to go for, how many users that have 2 dedicated graphics cards will actually want to use the onboard graphics when they already have 2 more powerful graphics cards in their system anyway?
The only real advantage is for users that wish to access the HD graphics features such as quick sync, but considering it’s only supported by very few transcoding programs and there are not many people out there that need or will want to transcode, it makes it almost pointless to choose Z68 over a P67 chipset.
Same applies to users that want to overclock the CPU but use the onboard graphics card; it’s a very limited market.
Finally, another feature of a Z68 chipset is known as SSD caching which is where it allows the use of a small (say 10 or 20 GB) Solid state hard drive to act as a cache for a larger ‘traditional’ hard disk. If you are already planning the use of a Solid State drive this feature is redundant.
If you can’t afford a decent size SSD (40GB+) then there are more cost effective ways around using a small SSD and SSD cashing like spending less on a motherboard, (H67 chipset or even a P67 chipset) and putting the saved money into a decent size SSD.
-What resolution ? At 2560 x 1200, grab the 6950's. AT 1920 x 1200, there's better choices.
Guru3D uses the following games in their test suite, COD-MW, Bad Company 2, Dirt 2, Far Cry 2, Metro 2033, Dawn of Discovery, Crysis Warhead. Total fps (summing fps in each game @ 1920 x 1200) for the various options in parenthesis (single card / SL or CF) are tabulated below along with their cost in dollars per frame single card - CF or SLI:
$ 240.00 6950 (479/751) $ 0.50 - $ 0.64
$ 260.00 6950 Frozr OC (484/759) $ 0.54 - $ 0.69
$ 205.00 560 Ti (455/792) $ 0.45 - $ 0.52
$ 360.00 6970 (526/825) $ 0.68 - $ 0.87
$ 220.00 560 Ti - 900 Mhz (495/862) $ 0.44 - $ 0.51
The 900 MHz 560 is $20 cheaper (here in the US anyway) but outscores the 6950 by 3% ..... no bigga deal .... but when paired in SLI / CF, the 560 really begins to shine with the lead growing to 10%. I checked ya site but it's one of the most user unfriendly sites I have aver visited. Found this one:
http://www.mwave.com.au/sku-42051061-ASUS_GeForce_GTX_560_DirectCU_II_TOP_overclocked_Video_Card_GDDR5_1024MB_256Bit_
Went thru that 1st as PSU much depends on the GFX card choice. I'd suggest the following 750 watters:
XFX Core Edition (9.5 jonnyguru performance rating)
Antec HCP / HCP (9.5 jonnyguru performance rating)
Seasonic X Series (9.5 jonnyguru performance rating)
XFX Black Edition (10.0 jonnyguru performance rating)
Antec CP* / SG series (10.0 jonnyguru performance rating)
Corsair AX / HX Series (10.0 jonnyguru performance rating)
* An 850 watt PSU but generally 1/2 to 2/3 the price than most comparable 1st tier PSU's .... requires compatible Antec case (P183, P193, 1200, DF-85)
A 750 watter will handle twin 6950's or 560 Ti's when both GFX cards and CPU are overclocked.
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