I've got no problems with the bass response. I'm using them in a relatively small room (maybe 10x15) and I leave the 'Bass EQ' setting enabled on my amp to boost the bottom slightly, but even without it's good. I figure that if I ever move to somewhere that is a much larger space, I can easily add the B&W sub from the same series, but at this point there's absolutely no need. I've mostly been playing vinyl and studio recordings over the past few days, but I did pop in the Eaton remaster of 5-8-77 GD and boy, did it soud AMAZING. The warm, reverb-heavy betty boards really shine on these speakers.
Definately worth investigating for a 'poor man's high end' or if you have neighbours or roommates. If you've got a huge listening room and like cranking your tunes at top volume the 603s might be more your style, but I certainly have no complaints. Plus they look great!