You all have talked me into building my own. This is what I have got so far. I would like to stay somewhere around $850. I have room to give and take $20 hear and there. I have never bult my own before so I expect I have made some mistakes.
Budget Range: $800- 850
System Usage from Most to Least Important: Gaming, school
You want a P67 chipset board. NOT a P55. 2500K so far works with P67 ( overclocking ) and H67 ( onboard graphics). Since you have a 2500K and not a 2500 you want a P67 for overclocking, the K models being unlocked.
So substitute that P7 P55 for a P8 P67 ( make sure it's a B3) and keep everything else. Nice build other than the MB mistake. You need a power supply?