Based on my experience with the Gallo's and solid state, I can heartily reccomend the NuForce Referenc 8 Mono's for $1600 a pair. These are small, light, high-quality switching amps, cool looking and running... very, very good, especially when you realize how much money you have just saved.
Sound quality n the same league as my reference $3000 60wpc tube amp, but with the benefits of SS bass extension and speed. Also works well with a passive or transformer volume control (I use the Sonic Euphoria). You can spend more on amps that heat the room... but with NuForce's 30-day trial, don't take my opinion, have an extended listen, how can you go wrong? I didn't.
Ric Schultz, one of the original audio visionaries and one who has lived longer at the bleeding edge of audio technology than most; who is well known and respected for his mods to digital sources; and who is a Gallo Reference 3 user, is now also a dealer for the new NuForce amps. Ric includes his level-one mods to the NuForce with purchase, at no additional cost.
I would have purchased from Ric if he had been offering the amps when I got mine.
See his site:
http://www.tweakaudio.com/