I'm looking to get a subwoofer which will significantly extend the lower frequencies from a pair of B&W 604's (S3), they are powered by one of the new NAD C372 amplifiers. I've been mainly looking at the REL Q200 vs the ASW650 but unfortunately am yet to hear either, although my local B&W shop assures me they will have an ASW650 soon. I have kind of discounted the ASW675 because of the way the amplifier is set up, from the specification it suggests that the amp is designed to deal with short sharp peaks of power and as I listen to a lot of different types of music I'm concerned that the onboard amp would be extremely unsuited to anything like drum & bass where there is a prolonged deep bass note.. is this a correct assumption do you think ??? It would be great to hear from anyone that has heard either of them in action, and even better if someone has been able to compare them. I listen 95% to music so need something musical. Or if anyone has any other suggestions for a sub in this price range which i should include on the short-list... ???? Thanks in advance for any help.