Yeah, 4.1 - still looking for the a center channel, although I don't miss it that much most of the time. anyway.. I use the system more for movies than music, maybe 65 movies-35 music.
The jbls are obviously very capable speakers, but where would you cross them over to the subwoofer (an AV123 MFW-15)?
Aside from the "wherever they sound best" advice, could you venture thoughts on the benefits of various crossover points. I know that as the crossover point rises, there is increased chance of perceiving localization of some material. I ask because some of the newer subwoofers out there claim that their mid-bass performance is very good, but the jbls have some pretty good components in them.
I'm using an automated sub eq the anti-mode 8033, that'll work up to whatever crossover I choose.
(for the future, as time and money permits I think I might look into new charge-coupled crossovers for the front 4430s since they're supposed to be a significant upgrade)