Triode Corp. of Japan 845SE. Huge transformers and gorgeous. Pre-in so can be used as a power amp. Very ballsy, sounds like 200 watts, not 20wpc. Can be used with real world speakers of 87db and above.
I used a Viva Solista for years and was happy with it. I think new, it is now over $10000. I actually prefer the similar power output Ayon Spark I use now. Different tubes and half the price, but I prefer it's sound.