So I found someone on Craigslist selling both of these speakers locally, used at a good price. I'm going to be running them with just a Peachtree Nova for the foreseeable future, using them for music and HT in a 2 channel setup. Turntable, Macbook Pro (optical out) and a PS3/Xbox 360 will be the main sources.
Having heard both of these, I'm leaning towards the Vandersteens. They seemed to have a warmth and detail to them that was missing from the PSBs.
The PSB seemed a bit less refined, and certainly more neutral.
The reason for my post is that I still have some nagging feeling that the PSBs are the better speaker, with more room for growth, especially if I decided to add a subwoofer, go full 5.1, add an amp to my system,etc. Admittedly this is my first purchase of "real" speakers, so I'm just looking for some guidance and experience.