Best Subwoofer for Magnepan speakers

I just added a Legacy rf Xtreme, i was a bit skeptical since the thing has 2 15" drivers, and you read all the stuff about maggies being fast and subs not being able to keep up or whatever. Well, from what I can see, it's just a placement issue and having a sub with enough flexibilty of adjustment to get a good seamless blend with the mains. The Legacy works great, I have it doing very little, it just fleshes out the lower octaves and provides that low end impact only when it is there in the recording.

The Rel Strata III works beautifully with my 1.6QR
speakers. The current version is the Strata 5.

Hello,
You may be still looking for a good sub. I also have the
2.5R's and I spoke to a Mr. Hsu at Hsu Research. He designs
subs that are built in ...ready China! I bought the VTF-MK2
and I couldn't be happier.
Check him out at http://www.hsuresearch.com/

Ron

Second the Vandy 2Wq.

Does anyone have experience running the James EMB-1200/1500 subs with Magnepans 3.6. Is the passive radiator design effective? Any fans of the Paradigm Reference Servo-15 with Maggies? Would appreciate recommendations for any subs up to $3k.