I've owned Basis 1400, 2100 and 2500 tables and still own a Vector tonearm. You really have to move up to at least a 2500 to get proper bass response. If you can find one used that might one way to improve things. The Basis motors are good, but you'll still be using a belt that stretches. The Basis suspension is a very good design and implementation but you'll pay a lot for it and it may not be necessary. You will also be somewhat limited to which tonearms will mount and work well with the Basis tables. Have you looked at the prices of new Basis tables?
For the money, I found the Teres and Galibier to be a much better value if you're buying new. Redpoint has chosen to go with a dealer network so that takes most of the value away. I have no problem with the wooden Teres tables. The dense, exotic hardwoods they use are much different from any hardwood in N. America. I don't think you could go wrong with either of these. It took me a while to decide, even after visiting both Thom and Chris. I eventually went with the Gavia. I've had it almost a year and I'm still very happy with my purchase. Probably the last table I will every buy. I know Teres owners that have had their 'tables for quite a while and they are also very happy with their's.