There are some good ideas on this thread, but I wouldn't be too fast on replacing the B&Ws and going with Tubes. The advantages of good SS are well established and Rotel makes a pretty good Amplifier. I would try a Hybrid (SS/Tubes) Digital Source Component from say Musical Fidelity or Cary Audio, I'd recommend buying one used, trying it for a bit and then if your not happy, sell it.
I would start @ the Source, it may solve your problem and you can stop there.
BTW: B&W sold more Speakers worldwide last year than all of their competitors combined, more R&D money was spent in developing the "Diamond Tweeter" than most High-End Speaker Companies spend developing an entire line. There must be more than a few nice sounding systems out there that utilize B&W Speakers, just a guess...
I would start @ the Source, it may solve your problem and you can stop there.
BTW: B&W sold more Speakers worldwide last year than all of their competitors combined, more R&D money was spent in developing the "Diamond Tweeter" than most High-End Speaker Companies spend developing an entire line. There must be more than a few nice sounding systems out there that utilize B&W Speakers, just a guess...