B&W 683 floor standers


I'd like to hear from those who own and play these on a regular basis. How do you like them overall? Are they too boomy at times? What size is your room? I'm considering them as an upgrade from B&W DM603-S3's. My room is moderate in size (2400 FT3) with 2 openings to hallways, no doors. What do you think? Do they produce good slam and punch at the low end? My room is bass starved and needs powerful speakers in this dept.
pdn
Thanks guys.

804ilawood: Wow, 380 watts/channel. Are you sure that's OK on these? The max power rating for the 683's is 250W.
Pdn: As to max power ratings and amp capacity - probably would not be a good idea to crank up a 380 watt amp to the max driving the speaker, but, so long as the amp is not continuously driving the speakers at max there is no problem. My guess is that 804ilawood drives the 1080 with a signal that does not push the 1080 to overdriving the speakers. Having this 'reserve' capacity, so to speak, goes toward not driving the amp into distortion. In short -an amplifier that is capable of providing more power than the speaker can take is actually a good idea.
Have you heard the 683? I've heard them a few times and didn't like them at all. The bass is a little improved over the previous model, but not much IMO. My biggest complaint is that they sound very un-cohesive. The lows, mids, and highs all seem to be detached from each other some how. Its hard to describe. The previous version didn't have this problem.

Everyone's ears are different. I've heard the 683 in a few different rooms and in a few different systems, and came to the same conclusion every time.

JR
Musicnoise: Thanks for the explanation on power ratings of amps vs the speakers they are driving. So what you're saying is that the Rotel 1090 would only actually put out it's full 380 watts/ch at full volume. Is that what you mean by max (full volume)? I never thought it's better to have an amp rated higher than the speakers they're driving. I would have always thought the opposite. It's complicated.
Kbarkamiam: Yes I have heard the 683's once I believe up close being driven by a high powered Rotel amp. From what I can remember, they sounded great but I respect your review and you could be right. That was back in late 2007 and I'll need to audition them again in depth.

When you refer to their previous version, I believe you're talking about the DM604 S3's. Is that correct? Those I had auditioned in depth vs the DM603 S3's back in early 2007 and I went with the 603's. What I'm considering now is upping from my 603's to the 683's which should improve on the bass ext, etc. What would you think of this potential upgrade?