step up from rotel?

Tiger,
I see you intend to move.
I'd put off extensive changes until the move is done and you have your space reserved. Than you can intelligently plan your equipment upgrade.

As a music lover, aim for something that evokes real, live music.

If nobody answered your question:: ICE is a tradename for B&O's version of class 'd' power amplification. It is highly efficient and therefore runs fairly cool. This technology is used by many aftermarket resellers. Bel Canto, and I think also Rotel? Other companies make there own version. Onkyo A9555 gets good reviews as do the $$$$ Spectron amps.
My ICE amp was made by PSAudio and easily runs my power hungry Magnepans. Some 'modules' come with included power supply.

I have a Stereo amp from International Rectifier out on my bench, awaiting a power supply. You could easily fit 4 stereo modules into a large cigar box and have 5 ch sound AND power to the sub.

Different is not necessarily better.

Invest the grand in a money market to get it out of your hot little hands and wait for the new space.

nobody's pockets are deep enough to change gear THAT often. Or at least non that I actually know.

No problemo. I had a root canal once and it was one of the least pleasant experiences I ever had.
And, it seems many root canals ARE on an emergency basis which just adds to the fun.
Heal well, follow doctors orders and enjoy your research: