Computer

Hey i am ordering the PC version of oblivion and I would like to know a good cpu to use it on because I just bought a small laptop for $50 bucks and I just sped it up and I don't want to entirely slow it down again. So I ask from any of you pc gamers to recommend a system for me to play Oblivion on..... and no I don't have a desk top CPU I only have a small lap top... So thanks for any suggestions-Emu