[JAFF3R]

Looks pretty good, but maybe go for the i7-3770k. Main difference will be that you can overclock it AFAIK so the extra money it will be worth it.
750w is overkill. My HD 6950 2GB card runs off a 550w PSU, and the HD7850's are recommended for 500w from what I can see on PcCaseGear, but if you're planning on going SLI/Crossfire then 750w is a must. $200 sounds expensive though? I've heard about the Antec TP-750w being not bad at all, and is only $140.
Go with what Tonsh said regarding hard drives. SSD's make your computer A LOT faster. I can turn my computer on and be in Starcraft II all in about 1 minute.

I guess it also depends on what you want to do with it, if its just for casual gaming then 16GB RAM is excessive. 4GB here and running BF3 and SC2 (not at the same time) fine. Though I'd probably recommend 8GB ram since it's cheap enough these days.

Just my 2c.