this is a great question but it lacks enough information for me to make a helpful suggestion. the Pass 260.5 MONOBLOCK amps are some of the best you can buy for starters. unless you get Magico speakers (or something similar on an "ultra-refined" level)
i don't see much need for an amplifier upgrade here. having owned rowland amps and preamps i can certainly recommend them but with B&W 802D's (i am guessing these are not the latest diamond series?) the question requires what is specifically lacking with such fine components as he already possesses. perhaps he would be better off upgrading his source component, or even a better pair of interconnects between the source and the corus preamp?
in my personal experience i had so much faith in the sound of my speakers (eggleston andra's) that i went overboard and purchased ever-higher grade wire.
by the time i was done the results were truly stunning- and so was the price tag, but i took it one step at a time over a +2 year period.
i don't see much need for an amplifier upgrade here. having owned rowland amps and preamps i can certainly recommend them but with B&W 802D's (i am guessing these are not the latest diamond series?) the question requires what is specifically lacking with such fine components as he already possesses. perhaps he would be better off upgrading his source component, or even a better pair of interconnects between the source and the corus preamp?
in my personal experience i had so much faith in the sound of my speakers (eggleston andra's) that i went overboard and purchased ever-higher grade wire.
by the time i was done the results were truly stunning- and so was the price tag, but i took it one step at a time over a +2 year period.