Hi all. I am in need of advice on a new build. $500 is the absolute max I can spend and I prefer not to involve rebates at all because I have had bad experiences with them in the past. I already have a keyboard, mouse, monitor (1680 * 1050), an AMD 7770 video card, and a DVD burner from a previous computer. I would like the new computer to have an upgrade path but I understand this might not be possible with this budget. I would prefer to buy from Amazon (I know their search function sucks) as they will not charge me sales tax (9% here) or shipping. Thanks for any help anyone can give me.