PMC speakers vs B&W... has anyone compared?


I'm coming to realize the next step up the sonic food chain might be more capable speakers then my CDM 9NT's. The Natilus range (804/802) might be the ticket... I've always used B&W's, but have an itch for something different too. Looking at the numbers of the PMC FB1+, seems to tell me their range is amazing - much broader then the 9nt's. I know specs don't tell the whole story so I thought I'd see if anyone with any first hand comparision of these brands might shed some light. What would be considered a better speaker in PMC's line the the smaller Natilus floorstanders?
Jazz and rock on vinyl is what I listen to mostly.
Thanks
sailfishben
Scottr gives good suggestions. PMC speakers do sound great with Bryston electronics. It's a matter of preference which is better but I would prefer the clean and uncoloured presentation of the PMC's over the B&W's.
I compared MB2 with N800. MB2 won hands down all around though some may prefer the euphony and soft warm presentation of the N800. Some people like valves some people like the truth ;-)
Nautilus euphonic HUH???? More like analytical and if anything mechanical sounding. Nautilus have precision soundstaging and disappear almost as well as small monitor speakers. Nautilus produces a wall of sound and pressurize small room quit well. This is based on my personal 1st hand experience.
Nautilus have warm and woolly bass and have very clear colourations on female voice. They go loud but sound lumpy and uneven. Ok for classical but awful for rock. Dealers always dem with piano music on all the occasions I have listened with them (and others I know found likewise). There is a good reason for this!
As an owner of N802s, and formerly N803, I find the Nautilus to be precise, not colored. Awful for rock? Not in my experience. It is absurd to claim that dealers always "dem" them with a certain kind of music.