Which amplifier

I was just thinking the same thing.  This happens a lot, I can see why.  You live where demos are tough or impossible so it will often boil down to to high end contenders that  used locally.

Definitely go out your way to audition amps at that price tier. Its a lot of money to have buyer's remorse on.   

TMR is a good way to buy used if in the US.   .  

If warmish, laidback sound, McIntosh. Accuphase more neutral sound. My preference would be the Mac. Plus the Mac would be easier to sale if it was not to your taste.

McIntosh 

Both are obviously very nice amps. For me, I’d consider a McIntosh MA-252 integrated. At 100W/ch that’s more than adequate power and the hybrid tube preamp/solid state power amp should match up nicely with the Cornwalls. And I personally love the retro-styling, especially paired with classic speakers like yours. At under $5,000, it’ll also save you a few thousand dollars to put towards a nice streamer or vinyl rig.