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
I use a B&W ASW-610 subwoofer in addition to my 683s. My room is open on the right and rear, 12-foot wood ceiling, saltillo tile floors. My listening position is about 12 feet from the speakers.

THe room is around 15'W x 20'L.
I OWN A PAIR OF THE 683 AND I LOVE THEM THEY HAVE CRISP HIGHS AND PRODUCE NICE LOWS. IVE GOT IT ON A 1090 ROTEL AMP PUSHING OUT 380WATTS PER CHANNEL AND I LOVE IT, BUT IM ABOUT TO PUT THEM ON AUDIOGONE SO IF YOU WANT A PAIR CHEAPER THAN RETAIL LOOK FOR THEM.
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.