I have a B-15 I use for 2 chan. and it took about 6 months to set it up. The problem I had was with placement being limited by the room. In addtition I have come to find that I have a very very large suck out between 20-30hrz as well as 50-70hrz. Not a good combo as it tends to rob the bass presentation of both its low end impact and the leading edge, making things too laid back. Then again, with plenty of energy at 30 or so you get a nice bump that can make it seem like all is well with some materinal and make setup a bit problematic as you go from song to song and notice the suck out with some material.
The revel does a good job at integrating and smoothing things out. Not perfect, as I still feel there is a bit of something missing in the 50hrz range, but after about 6 months all is in very good shape. Be prepared to play around with setup/placement, cables and your main speakers to get the best from it.
If I had to do it over I might go with the 30 or with Aerial maybe even on of the thiel's. But at the price range around 3k I don't think there is much better.