I agree that the Vandersteen are fantastic subs. I use a pair of 2WQ's with my Vandersteen 3A Sigs and love them. I also use the Superzeros in my living room system and think that they are great speakers.
There are actually two types of Vandersteen subs. The 2WQ is designed to use with a full range speaker (due to their first degree crossovers)and would be a poor match for the SZs due to their limited LF response. The V2W is designed for a line level input and may integrate better. I have no experience with the V2W.
I use the SZs with the NHT SW2 sub which was the combination described back in Stereophile in 1994.