Mblock66, here is a website you may or may not want to bookmark for future reference to answer any questions about PC hardware, as for CPU`s this may help in your choice. Another thing you should consider is mother boards, there are good ones and crap boards, without a good mother board all the best hardware won`t mean a thing if it connected to an inferior board.
http://www.pcstats.com/articleview.cfm?articleID=2164