Time to upgrade!

I am a multi-tasker. I use my comp for website design, graphic design, book writing, and internet surfing. Hubs is being a doll and letting me upgrade my system with a chunk of the tax return. I am not spending a ton and I can't go Mac because all my software would have to be replaced as well. I want at least 8GB Memory, 1 TB hard drive, a good processor, and probably 2 monitors. I think running dual monitors will help in the designing since right now it can be a pain to flip between my Adobe, HTML, FTP, and E-mail when I am updating one of the sites I handle. So what is your opinion on a good system? HP, Gateway, Asus, Dell......... The list goes on!!