Subwoofer Selection HELP ? ? ?


I am re-building my system for a media room. I have all Magnepan speakers (3.6, and all MMG-W's for center, surrounds), with Bel Canto Ref1000 and Parasound A52 run by a Cary Audio Cinema 11. I really am struggling with what sub to get? I have not yet, but plan to buy a turntable and I have a Denon 5910 (being modded), so I love to listen to 2 channel music, but the room has a new projector and will definitely be used daily for movies/video.

All that said, I want one big sub. I have narrowed my choices to;

Definitive Techology Trinity

JL Audio Fathom 113

Revel b15a

Velodyne DD-18

Suggestions????
macdadtexas
I think the trouble may be to get that fast bass for music may not be ideal for the lowest blast and booms for movies but I would say a sealed sub design is just about a must.
If you want to save a bundle, go a little vintage, and don't mind a large clunker size cabinet, I used (and still do) a Velodyne ULD-15 series II with my original MG IIIa and later my MG 3.6Rs with great success. It would be hard to beat for Movies and was suprisingly fast in mating with my MGIIIs and MG 3.6Rs.
I'll second the SVS rec. I've had a PC13 Ultra (cylinder version) for a couple months and it is a beast for movies and quite musical as well for half the price of the Fathom.

It is "fast" enough to keep up with my Martin Logans effortlessly.

I consider it steal at $1500 (shipping included).
Nice subs no doubt. If I were to choose from your choices it would be Velodyne DD-18 then the JL Audio Fathom based from years being a Velo dealer. The JL Audio could easily be my first choice though as well. That's a tough call.

Another sub we are having great success with is from Triad speakers. Specifically, the Triad Gold/Platinum PowerSubs. Both are as good imho as the others mentioned and are less expensive. Plus, these are righ-sized unlike some of the ID brands that go for shear output and are as big as Volkswagons in your living room. Ouch!
I had stopped thinking about the SVS, but what about a PC Ultra Cylinder and one of the smaller box subs for music? I wonder how that would work? Maybe a perfect marriage???

Thoughts??