I'd say let your budget be your guide- the Tower 2's are great, and are one of the best bargains out there in speakers. As you move up, you'll get a fuller sound and more definition. I have the Stage 4's, played with 2A3 tubes (less power than 300B), and they sound great. Smaller cabs than Theater series, if that's a factor. With the 300B's, you can go with any of these, or the Pro series w/ JBL's. There are a lot of posts about each in the archives. Good luck!