Getting all the speakers into the same room/listening environment would certainly prove to be a large equalizer in some sound disparities.
The last time i hear B&W 603s, they also sounded good (long time ago, can't remember exact impressions) but the room was very well designed for auditions. I'm doubting they would sound the same in my hard walled basement.
Being able to compare some Paradigms to the M60s at home would be fun though. Maybe on my next trip testing out store return policies....

"Those who preach the myths of audio are ignorant of truth."