That is a greal build I am upgrading mine to be actually almost to that exactly. I have the i5 2500k and it is great, you chose a okay case if you spend 50 dollars more you can get something like the cosmos s which is worth it if you want a less expensive case get this one..
As for the GFX.....last gen cards under $250 ... pick one that suits ya needs.
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:
here is a link to the memory it is a Norwegian store bout there is pic http://cdon.no/elektronikk/corsair_8gb_(kit)_ddr3_1600mhz%252fcl9%252fvengeance-blue%252f1%2c5v-14929242
I do not think it is low profile
the reason for Micro-ATX is that it was cheaper and i got all that i need on it "is there any problems using that in stead of ATX
for the case i kinda like it is there a problem with it
for the HDD i like the Seagate Momentus and will get that in stead
and I do not really understand what you mean about the GPU do you mean that i is a good choices with the XFX HD6870 or not