Hi, I'm thinking about getting a sub - I've got a Arcam A85 with B&W CDM1NT's, which isn't quite deep enough for my tastes. I've got a fairly small room -- 15'x10'-- and a budget of about 300 - 500 GBP (~$700). I'm thinking about the MJ acoustics pro 50 - it's small and seems to have a pretty low extension, and it's very cheap. I've also seen second hand Rel Strata (mk I) for about £300 -- would this be a better choice, even with a smallish room? What other options might be sensible, given that I only want the sub for music? Cheers for any advice!