ill tell you this
if you get an i3, i5, i7 then make sure you turn off hyperthreading or multithreading if you only use one core
if you decide to run a quad-core, then dont mess wit it
i got my old PC built at a store in ceres, i pointed to what i wanted in the PC and they put it together, at the time it was top notch shit that would have cost a G from gateway or dell, i paid 550 for my tower w/o a monitor
try looking a few PC stores up and see if they build towers...if they do, thats the cheapest method
if u wanna look up computer shit and read reviews which i suggest you do...go to
www.newegg.com and browse around