Nice build. Ultra on FC3 will be very playable. You will probably be in the 30fps range. I would get the parts from newegg. I don't quite understand what your question was asking, but I can tell you that that is a nice build, and I wouldn't change any part on it.
Don't forget your copy of windows! Very similar to mine I just have a windforce 660 and an i7 3770 but I do get 60 fps on ultra in BF3 multiplayer. Haven't gotten FC3 but looking around youtube ultra is more than playable with over 30 fps without SMAA