I want to build another system, something powerful. I run a business from my PC and usually have buttloads of windows and internet browsers open. I'm familiar with XP and I know many of the little nuances, things I pull my hair out trying to figure out on a Windows 7 machine. Is it really worth sucking it up and re-learning these things? Do I need 7 to take advantage of the latest hardware in making a fast PC, or will a 64 bit version of XP do that just fine? I always drag my feet when it comes to switching away from things that seem to work absolutely perfectly for me, but maybe there's more to it hence the post.