Thinking of buying a solid state amp

Smaller listening room probably also means less power required to reach high volume levels. If you like the BAT sound, why not at least try the smaller BAT or some other smaller tube amp?

A lot of people over estimate the amount of power needed to drive a pair of speakers. To achieve high output for either tube or solid state amplification, some sacrifice in terms of sound quality is inevitable. Often this comes having to parallel a lot of output devices (more of an issue, to me, for tube gear than solid state). Perhaps a small compromise on available power for the few instances when really high sustained power is needed will yield greater rewards for the vast majority of your listening.

I personally don't think that ANY solid state amp sounds like a tube amp, though, many do, nonetheless, sound good to me. The true Class A solid state amps will also run hot, so they may be out of the running. Some of the brands of solid state amps that I personally like, though I would not call them warm sounding, include Ayre, Belles, Dartzeel (quite pricey). The older, non-Class D Rowlands were quite warm sounding, though a bit dynamically dull for my taste.

If you really like the sound of the BAT tube gear, you should at least give there solid state stuff a listen to, regardless of what others may think of how it compares to other gear. To a large extent, the sound of gear is "voiced" by the designer, so the same designer would have similar sounding gear even if the designs are radically different.

I've only heard early iterations of the Bel Canto and Rowland Class-D amps, and neither sounded very good to me. But, I am sure the technology has advanced considerably, so you should certainly consider them, particularly because of their low power consumption and very low heat dissipation.

Good luck in your search.