Keep SVS SB16 or change to REL S5 music only

Personally we would recomend instead upgrading the loudspeakers.

The change in sub will not gain you much, a Rel is generally a tighter sounding sub then the SVS.

We have the SVS Ultra 13 on the floor to try it out it was a trade in and it was a bit on the slow and boomy side, but it did move alot of air.

Other subs from Paradigm, and a few others were better for music.

However with that being said after looking at your system, the weak link is the B&W CM 10, going to a large speaker with deeper bass will sound way better and the sub will only have to add very little to increase that speakers bass output.

So by upgrading the speakers you will make the subwoofer integrate better, and you can increase the system's overall performance greatly.

Just food for thought.

Dave and Troy
Audio Doctor NJ

You could also try changing the placement or PEQ settings of the SB16-Ultra. There's a fair chance it sounds boomy because of placement.

The EQ is the thing.

Not all speakers integrate well with a subwoofer. You might be better off not using a subwoofer with the B &W! You might be spinnin' your wheels changing to another sub!

You know, I think Erik is probably right.  I imagine the SVS SB16 could be tight and musical if set up properly, which can be extremely difficult I imagine.  

Do you have someone who could maybe help with set-up?