Vandersteen 2ce subwoofer options, REL or 2wqs?

Dear all,
I have balanced amplification, and want to go the stereo subwoofers route. I want to try Vandersteen 2wqs, but the balanced crossovers run at $1300, and are almost never up for sale used. That's before I even get to shelling out for the subs. I understand the potential merits of an integrated Vandersteen speaker system, but are there other options? Anyone try REL T9i with 2ce sigs? Same concept of running subs off the amp outputs, but you lose the high pass of the mains.

By the way, this will be for a 15 x 22' basement room.

Thank you!
Paul