I just got my Def Techs the other day... the 7002's, clr2500, and 350's. I have to say that I do love these speakers and owning these new ones has only reinforced my opinion of them since it was first formed probably 10 years ago when they first started coming to HT prominence. I'm not a fanboy...I'm not even sure I know what that means... but I do like these speakers... a lot. For the price point, I think you get a tremedous speaker.
As far as B&W goes... the top line 800's would be the speaker I would have and will have at some point. AccuDefTechGuy was just giving his impressions based on what he heard in the gven setup. I'm not an expert by any means, nor do I have any serious experience with B&W, but the few times I have heard them they were setup in much different configurations... at least 10ft apart I'd say and had considerably more power. I know one person who has a home theater/audiophile quality listening room. He each 801 powered by a monsterous Halcro amp (I'm gussing a monoblock but I don't know much about Halcro except that they cost about as much as typical car). The other setup was in a a/v store I visited a couple or so years back that carried B&W, Krell, Macintosh and some other high end stuff. Their room also had each speaker powered by a Macintosh monoblock (coincidently... this was the visit that got me turned out to Macintosh... I never really cared for the stuff, but once you see and hear in action, you can really grow in affinity for it).
Anyway, Classe is nice stuff, but I do think that setup probably didn't even come close to the way those speakers should have been demoed. As much I love Def Tech, I can say with complete confidence that a properly setup b&W rig, albeit a ridiculously expenseive one, would be far superior to most mid to high end speaker setups... but again... your complete system would likely exceed $50K and approach $100K or more in a full HT... so they should blow anything away.
While I'm at it...one of the other reasons I personally like the Def Techs was because of the well executed built in subs. Big square boxes just aren't room or wife friendly. I don't have the luxury of no holds barred setups... I think most of don't. We have to balance the HT within a main living area and balance it with what makes sense in your house with your family. So for me, these speakers really fit well... budget-wise, room-wise (sorda), family-wise, and very importantly- performance-wise.