which sub to get

I think there's a great case to be made for multiple subs, but in MOST rooms, especially if mostly near field listening, you really can easily get away with one...if it's a well designed sub like REL makes. "Aural cues" that determine soundstage accuracy aren't in the bass domain really, and note that a REL sub when utilizing the "high level" signal from the power amp won't relieve the main amp's task, but will certainly SEEM like it is. I have skinny tower speakers with a front firing REL behind one speaker and it loads my large-ish room just fine...a lucky acoustic profile in this room helps everything, and I do have to adjust the sub level here and there.

WOLF_garcia wrote " I do have to adjust the sub level here and there." I totally agree. It is absolutely important to
to set volume precisely. Most audiophiles set volume too
high, presumably because they want to hear strong, powerful bass all the time. A properly adjusted sub do not call attention to itself all the time; only when the music demands it.

Every REL sub I have heard has sounded very nice. A Revel b15 is a heck of a sub AND with its built-in EQ should be able to integrate well.

REmains8-

REL makes the best subwoofer. Model t-5 should integrate nicely into your system. Keep me posted & Happy Listening!

The "precise" volume setting changes when needed...I instantly know when it's too hot or not, but I have a "default" setting for most of the time, and stuck a "chicken head" knob on the volume so it's easier to steer.