These are very different speaker designs. I would advise you listen to a pair of JTR first if primary focus is music and you know you LOVED the B&W. If primary focus is home theater - you can't go wrong with that choice in any way! Back to music - - - we compared JTR to Salk (which is more like a B&W design, but I'd bet the Salks are better) for music in a blind G2G back in January in Des Moines and it was a split decision with people either really liking one or the other. 6 of 11 preferred JTR 212HT over Salk for music. BUT in talking to the guys who voted - they REALLY preferred one or the other. The sound is pretty different and the preference for one speaker over another was pretty clear cut for most of the voters, even though the vote was effectively split. JTR is a live concert, 4th row seating, incredible sound, and the Salk are a small intimate high quality recording sound. Both excellent - but very different in my opinion. When the same speakers were tested for home theater use -- the JTR's won more decisively with 7 of 9 blind votes, and both camps seemed to appreciate the better dynamics much more clearly.
The 212HT are better than the 228HT for music by a bit, but for home theater use are darn similar.
It depends on your needs and more importantly your ears.
JTR speakers require the use of subs since they rolloff hard to preserve sensitivity and accuracy --- I assume you have good subs?
JTR does allow for a 30 day money back policy - so you'd only be out shipping both ways if you didn't like them (which is highly unlikely)