"The B&W Sound"

Does the "B&W sound" that may critics complain about have more to do with design or materials (perhaps both)? (i.e.: does a metal dome tweeter always impart a bright signature, or does it depend more on the crossover design?) I don't hate my 703's, but I'm certainly not satisfied either. I have been considering speakers that utilize a soft dome tweeter. What are the signatures (i.e.: weaknesses) of a soft dome design (if any)? Most importantly, what speakers will: 1.) Play at least as loud as the 703's (yes, I'm a product of the 70's -louder is better); 2.) Offer superior highs (smother, but still detailed); 3.) Rival or better the 703's bass response; 4.) Cost less!! ($2,000 - $3,000 range)??? I would like to hear from previous B&W users - preferably those who have replaced their 703's with speakers that offer a less fatiguing (i.e.: bright/harsh) sound.

Thanks,

Ben