I'm looking to possibly upgrade to floorstanding speakers...and at the same time, just look to see what's out there. My first "real" speakers have been my current speakers, a pair of B&W 601 s3's paired with an LCR60. I am running an SVS PB10-ISD to handle the lows and some Polk R15's for surround. In looking around, and considering floorstanders, I've read and read and read...and then read some more. I came across Mordaunt Short in the Audioholics recommended system list. I'm looking to get the floorstanding Avant 905 paired with the 905 center. I can't find any dealers around so I can't really listen to them, but figure you can't really demo Axiom, Aperion, etc, either...you just have to order and hope. While knowing that, is there anyone that could tell me a little about the differences here...I mean, what can I expect in terms of differences? Is the sound significantly different, moving from the kevlar driver of the B&W's to the aluminum driver of the MS's? Is the difference bt. floorstander and my bookshelves the biggest differential, more so than the manufacturer? I found an online dealer for MS and am tempted to pull the trigger, but before doing so, just wanted to ask around...Mordaunt is not a name I see come up very often in these forums, but when I saw them as the recommended set, considering all the speakers out there, for a $12K system, I got to thinking that there has to be some reasoning behind that. So, is there anyone that could enlighten me. Would these be a "better" set of speakers than my B&W's in terms of performance? Very similar, and thus I may not really notice a difference? Save your money until you can make a significant upgrade? Any response is welcome. I don't have tons of cash, so the thought of plunking down $1000 on speakers I've never heard seems a littel scary, so I'm just looking for thoughts opinions.