OK so thanks to all you guys on this forum, I've found my sub!!!! I've decided to go for the BK XLS200. It arrived last week and I think it's better than any of the other subs I've tried to date. I can't believe I was going to buy the REL Q150 for almost twice the price. Don't get me wrong, the REL is a great sub but I'm not sure it's worth £500. Especially when the BK does the same job (maybe even more) at almost half the price!!! So a big thanks to those that suggested trying the BK. I'm very grateful. However, as with evey sub supplier, it comes with the worst lead in the World!!!! I reckon a piece of string would give a better response!!!!! Can anyone advide on a good cable to buy? I need a good length of it, about six meters. Thanks. shr.