Different kettles of fish, tube and solid state as you know.
I've only really once heard a solid state amp that I thought rivalled a tube amp for audio quality, it was a Coda integrated amp that someone my father knew had in his home, driving some Spica speakers. I didn't think at the time I could ever afford something like that, and I was at the beginning of my SET search that led me to Decware, and was using my EICO integrated amplifier at the time.
The Proton is pretty good. I've used it with my RL2s for longish stretches (last time was when I had the Monoblocks in for a revamping) and it does everything right but just doesn't have the holographic imaging and soundstage that the Decware amps do. I was surprised at the tonal balance, it was better than I'd ever remembered it in the past.
I'm listening to a great cd, Henry Threadgill Live at Montreal Jazz Festival, and the Torii MK III and the IT Radials and the Sony SACD player are just getting it so right. With the Torii, you don't need a big solid state amp for power reasons, the Torii just dishes it out, and gives you the impression it's so easy that he can read the paper at the same time.

Maybe vinly would be better, but I got a seven cd set including this cd for what I saw the lp going for! Digital in my main system is so good I just don't fall for the "vinyl is the only really good sound" argument. (Overheard two guys arguing that one out at a Guitar Center a few days ago).
I know I'm blessed with two great Decware based systems and hope I can keep that up through the next decades!