get the AMD fx 8350, youll save money compared to intel 3770k and the 4770, not to mention if your set-up is good youll actually get more frames in more applications/games other than FSX.
get a SSD, start with 128gb if money is a problem, and look no further than Samsung
GPU - no older than the 660OC version, your in the USA, stuff is cheap there, in my country im considered royalty since i got that
minimum 8gb RAM with 1600mhz (no XMS)
1tb HDD for big stuff that wont go on the SSD
700w PSU - why? - because its safe on the long run or later upgrades
greets