Right, made some adjustments based on what you said. Only a very minor price increase for what seems to be a fairly good quality upgrade on some parts. This is what I'm thinking of now:
Graphics:
http://www.newegg.com/Product/Produc...82E16814130572 - $130
Power:
http://www.newegg.com/Product/Produc...-028-_-Product - $35
CPU & Motherboard:
http://www.newegg.com/Product/ComboD...t=Combo.500536 - $182
Case:
http://www.newegg.com/Product/Produc...tem=11-146-059 - $40 - This one seems the best all round at that price.
Memory:
http://www.newegg.com/Product/Produc...82E16820231303 - $95 - 5/5 reviews and it's the one you recommended as well.
Storage:
http://www.newegg.com/Product/Produc...Spinpoint%20F3 - $75
Optical drive:
http://www.newegg.com/Product/Produc...82E16827106334 - $22 - Seems a lot better quality for only $2 extra.
OS: Windows 7 Home Premium OEM - $105
Display: ???
Keyboard: ???
Total: $684 + display + keyboard
I'm wondering what I should do with speakers. I got Bose Companion 3 on my iMac, they're pretty good for music. I guess I could simply plug them in to the PC when I'm not using my Mac, and transfer my iTunes purchases to the PC for when I want to listen to music while playing WoW.
Are you sure I'll need a new heatsink? I haven't noticed any complaints about the default one.