I recently moved and for now the AV gear is chucked in a corner on a cabinet until such time as I finish decorating the upstairs of the house and can make a start on downstairs.
System is currently 3.1 based around:
Sony KDL40S2530 TV and PS3,
Sony STR-DA1200ES powering the centre (and eventually rears) with a Behringer A500 for fronts,
PMC DB1i for the fronts, a Paradigm CC-350 in the centre and a REL Strata for the sub.
I recently blew the sub up - literally - watching Avatar. The driver and amp were fine but the enclosure over pressurised and with the glue being 10 years old or more, split down one of the edges!
http://www.youtube.com/watch?v=3nlFUF_zpvE
You can clearly see the line in the centre disappear when I squeeze the side. Sadly this gap creates a huge audible vibration when trying to push the sub hard. I've managed to glue it and seal it for now, but it's very much a short term fix. New sub needed. Question is, what to go for. The BK Monolith is attractive but I really believe in auditioning before paying money. A matching PMC sub is a possibility, but unless you're looking at the X series they don't go low enough for my liking and cost a stack load!