Are the A/B models a good choice, or just stick with Class A. And are they a better choice than Bryston amps?My opinion is that class A Accuphase is much better than Bryston -- even though Bryston is the most decent, reliable, & good value products out there that I know of. Class AB is also good, but may not be a "stratospheric" improvement on the Bryston...
On the other hand, the 2810 pre, will make a huge difference even with your current amps (that are excellent IMO).