OP, I hope you don't mind me posting up here. I'll happily delete, if you'd like me to. If I was local, I'd be buying them.
I just wanted to give this a little bump, because people often don't realize how good and how rare these are. Last year, after looking for a "very" long time, I found a used double stack of W210s and purchased them from $3500. I don't think that most people realize how game changing these subs can be and how fair your deal is.
They're not just subs, they easily cover the entire bass & mid bass region. These go well beyond the traditional "xo at 50hz" and try to make it sonically disappear approach that is employed with most sub implementations.
Because they can play cleanly up to 500hz, plus the fact that they're corner loaded (spaced as far apart as possible), also means that they can be used to move the most ITD sensitive frequencies (70-400hz) out to the boundaries of your room and well beyond the optimal placement of your mains. This in turn, can greatly enhance perceived stage width.
In a double stack, that's "eight tens" for bass and mid-bass duty (@96+db sensitivity). This allows you to pull your mains out into the room for the best possible imaging without having to worry about compromising bass response.
They're insanely rare (try to find another used pair, especially in the US), even the drivers are very hard to find.
Lastly, they don't require a Tact/Lyngdorf system to integrate well into a system (any active xo, mini-dsp, dcx2496, etc. can work).
Anyway, I hope you don't mind me chiming in and GLWS!
