I'm thinking about upgrading my machine a bit and considering 4gb of ram since ram is so dirt cheap these days. I've done my research and you pretty much have to have a 64bit operating system to handle 4gb of ram properly. I used windows xp 64bit back when it first came out well over a year ago (I think) and it was pretty bad, mostly because of driver support I suspect. So I'm wondering what the state of Vista 64bit or even xp 64bit is now that 64bit operating systems have been out for a while now. Thanks in advance.