the o7 is pretty expensive. but thats probably the best price ull get without without gettin maybe a cheap msi x58. but for ur res u dont really need the 1gb version of the 4870, u could suffice with the 512mb if you wanted. also i didnt see any ram, make sure u get some triple channel corsair or gskill. the gskill nq's at 1.5v look to be really good, maybe consider those.