I looked at a back-panel picture and noticed that the Peachtree has pre-out connectors. Couldn't you simply use those to drive a more powerful amp section?
You might want to consider auditioning a Butler Audio TDB-2250 power amp hooked up to the Peachtree - plenty of power with 250 Watts/ch. and it is a tube/MOSFET hybrid giving you, perhaps, the best of both worlds...$2995
I've run my MicroBe with a Musical Fidelity A5 for a while and, indeed, it was a good and well balanced combination. Then, I moved to an Accuphase E-550 integrated (30 class A watts in 8 ohm). The combinations is marvelous.
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