I'm asking this for a friend of mine who has limited knowledge of gaming hardware. I used PC Part Picker to list the parts. I did this quickly at 5:30am so hopefully it's decent: http://pcpartpicker.com/p/ihcm
Approximate Purchase Date: probably within the next 3 months
Budget Range: $900ish
System Usage from Most to Least Important: gaming (Guild Wars 2, Diablo 3, Blade and Soul, Torchlight II, BF3, Borderlands 2)
Are you buying a monitor: No
Do you need to buy OS: Not sure
Preferred Website(s) for Parts: none, really...
Location: Zip 32960 (Florida)
Parts Preferences: part agnostic (though I prefer Intel for CPU and AMD for graphics)
Overclocking: Not initially. Possibly in the future for longevity
SLI or Crossfire: Not initially. Possibly in the future for longevity
Your Monitor Resolution: 1920x1080
Comments: He mostly plays MMOs, partially because his current desktop can't handle the newer first person shooters. Hopefully this will get him above 60 FPS in MMOs and around 40-45 FPS in shooters.
And Most Importantly, Why Are You Upgrading: his first gaming rig!!!
Video Card:EVGA GeForce GTX 560 1GB Video Card ($139.99 @ Newegg) Notes: I think you were overspending on your previous GPU. I can run BF3 on max settings with a GTX 460; the GTX 560 is an overclocked and optimized version of the 460. It's still near the top of the performance charts (see here) and will cost you $120 less (it's also a very quiet card).
Power Supply:SeaSonic 650W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply ($99.99 @ Newegg) Notes: This PSU is normally about $130, $10 more than your previous choice. So for $10 more you get superior build quality, true modularity (on Newegg, "modular" means you still have a mass of cables mixed with some modular ones, "full modular" is imo legitimately modular, meaning you actually plug in only the cables you need), and a gold efficiency rating as opposed to just bronze.