Thanks Guys! I think i'll just get ultimate feature wise, it is on sale at my local pc store for 159.95 so yeah. also ur6beersaway I've got a 256gb ssd that I'm going to stick windows 8 on so it should be quick!
Like noidea said, it depends on the features you need. If you're just going to use it in a home environment, you'll probably be fine with Home Premium. If you wish to use the computer in a domain, you should take Professional.