Subwoofer budget max $700: new vs used, brand?

The 10" SVS sub is $400 and the company has a stellar rep, although that is mostly (I think) built on their larger subs which start at app $600 for the 12" model.

However, IME, integration is first priority, before ultimate subwoofer quality. I use the Velodyne SMS-1 sub controller with middling quality subs and am delighted with the performance. Therefore, I'd personally spend less and buy a lower quality sub if that also allowed me to buy a good controller for improved integration. I'm sure others will disagree.

You can get the Velodyne SMS-1 sub controller on line at $400. This has a very flexible low pass filter (and a rudimentary high pass for your mains), room analyzer, and PEq to allow (with some work and some patience) seamless integration of a sub (or subs, up to 3) with many different main speakers. I haven't heard the 10" SVS, but given the company's reputation alone, I'd be awfully tempted to go with that sub and the SMS-1. Caveat: total cost of $800 is a bit over your max.

Marty

Marty, thanks for your thoughtful response. It's caught me off guard. You're saying that integration is the priority and that a trade off in the speaker (at my price point) could be considered.
Do you think this is the best approach for a room that can sound very different depending on your location within it? I suppose if I can visualize the room's eq's, and I'm aiming (compromising!) for the best overall sound throughout the room, rather than "ideal" at the vaulted "sweetspot" or listening position, I would measure the eq at various specified positions in the room, note curves and try to reproduce a "summed" or average curve that doesn't have pronounced peaks or valleys for all measured locations? Assuming that the above approach makes sense, will the SMS help me achieve my goal?

Rel.
Worked for me.