Power Amp suggestion

I haven't logged in for a long while but I think the first response is a correct one.  First thing is to see if its really the amps you want to change. If you decide its the amps that seem to be lacking it is unlikely on the basis of power or quality.  Different solid state amps do sound differently.  I have a friend who went from very high end 2000 watt monoblocks to a different set. Neither were Swiss but every bit the caliber IMO. He loved the difference - but note its the difference.  Not that they are so much 'better'.  He found the new amps much more detailed and 'crisp'.  I inherited the old ones and they are quite wonderful, but a bit more laid back. Sometimes we just want a change.  Your best bet, if you decide this route, is the audition in your system. 

There is nothing specifically I don't like. II think they are pretty good and extremely well built. I have had them for 5+ years, since they were introduced. I have been told by some of my local equipment dealers that these  amps are perhaps due for an update and hence the request for suggestions. More detail, faster would be nice. More likely i just need a change. 

More detail, faster would be nice.

I wouldn’t be looking at changing amps if that’s what you’re looking for.  If you really need a change I’d focus on speakers as you’ll get the biggest change, and IMHO speakers from Joseph Audio, Vandersteen, ProAc, Usher, Nola, Magico, YG, Wilson, Avalon, Audio Physic, Boenicke, Vimberg would all give you more significant improvements than swapping amps.  IME B&Ws are detailed but clinical sounding and not nearly as musically involving as any of those listed above.  I respect B&W speakers but can’t love them, but that’s me and clearly many others would disagree.  Anyway, best of luck in finding whatever it is you’re looking for. 

It's in the best interest of your local dealers that you update your amps but not necessarily in yours.

Bryston is one of the only manufacturers known specifically for designing for minimum 20 year life span. I'd ask them if at some point cap replacement would be a good idea. But I'd bet that you wouldn't need to do it for a long time. 
Unless you got the chance to try one of the contenders in your rig and heard a big improvement, I'd suggest hanging tight. If you weren't thrilled with the sound, that's another story. Cheers,
Spencer