Looking for the "better sub"

I have Magnepan 1.6/QRs and would like a sub sometime soon to fill in the low end.
Subs suggested to me have been as follows...

Vandersteen 2wQ....problem with this sub for me is most agree I need two from the start for my 25X15 room.
JL Fathom 113....I would have ordered one, but no high level inputs turns a great sub into a home theater product in my eyes. They blew it.
Martin Logan Depth....still a frontrunner. Quick and musical. And one works well enough to get started.
REL....Still looking into these.

So I guess I'm looking at a budget of about 2K...a bit more or less. Anything else I should be looking into beyond the above? Please comment if you've heard the models above, which (except for the Fathom) are well known for working nicely with Magnepan panels.


I own Maggie 1.6s and had a Rel Stadium III. It was actually too much for my room, but it blended nicely. It cleanly beat the Depth head to head. More musical and better integration. I now have an MJ Acoustics Ref 100, and it's nearly seamless. I actually almost forget the sub is in the room sometimes. I was surprised how much better the Maggies sounded with a properly dialed in sub. For a room that size, I'd recommend the MJ Ref 1. The Vandersteen is musical, but for that size a room you'd definitely need 2.
Rob, I'm also interested in the responses here. I have been debating the fathom but like you wonder about the integration with out high level inputs.

Thanks for bringing that up!