Vandersteen users; do you biamp?

Garfish,this is what Vandersteen says about using the WQ subs" The drivers are connected to a built-in 300 watt amplifier with advanced feed-forward error correction. This powerful amplifier provides the benefits of bi-amplification to the system without the additional expense and complexity of an additional separate amplifier" So technicaly it's NOT bi amping as you say but does provides the benefits...it would be an interesting shootout to try both.

Joe- there really would be no comparison, as the sub provides an additional dimension, in addition to additional amplification. The quote from Richard Vandersteen, is, I am sure, referring to the fact that you will "free up" substantial power from your main amplifier by not having to reproduce the lowest bass notes. If you've ever had an amp with meters and watched them swing in time with the bass line, you will know what I mean.

In my setup using even a single Vandersteen 2Wq improved the sound much more than when I tried Bi-Amplifing without the sub.
Using the sub also eliminated some serious room resonances around 80hz that I couldn't eliminate by repositioning the speakers. Personally, if I were you I would not worry about Bi-Amping at this time, and just bi-wire (if you can afford it). When you are ready to step up, then compare Bi-Amping to using a Vandersteen 2Wq.. and judge for yourself which gets more for the money.
In the meantime, keep listening and try not to get headaches over gear :)

Will