HI Celo,
I think what you should do is go to your audiophile store and listen to a range of amps (that are aleady warm) of your price. If you know someone that you can borrow an Aleph, bring it to the store and compare.
Yes, class A amp gets warm and su... more energy but the sound is very nice. I had had a Kinergetics kba75 (75w in class A) and it was a very good amp but again gets warm. Did have not long ago a Simaudio Celeste 4070 amp with rca and xlr inputs (I had it for 6 years as a reference amp). Cool amp, not power hungry, and very musical and detail amp. Good in every aspect of music (bass, mids,high). More the preamp was of high quality, better it sounded, but even a bottlehead foreplay was a big surprise and a good match... But the Classe DR25 classe A amp was the best in term of 3D sound and with fantastic mids...but was hot.
Now, concerning the Golden Tube se40. It is right that it can have reliability issues but not if you use the good tubes. It is also right that it was not the best in bass and highs but pretty goog in mids. I own one and did mod it 3 months ago with Loc Vu kit from Yahoo Golden Tube group. This is not a small mod but a huge one that is worth the price (less than 200$ when I ordered it).It is now a totally different beast. Bass have more attack than my ss amp right now (a 2600$ amp) and mids and highs are even better. No more distortion as described earlier by someone else. Plus, I hear clearly details that I could not hear before. Feel like in a live concert everytime. I am impressed by this modded amp. Tubes amp and tube preamp are now what I listen to. Personnal taste. But again, it gets warm and it is more power hungry than a class a/ab amp. Also, you can't let tubes amp at on all time...
Since I live in Quebec, I use my ss amp during hot weather in summer, and use my Golden Tube and also my ASL ki22 Fox DT integrated amp (very very good with efficient speaker) during fall and winter since they are warming my living room and plays music in the same time..............
Good luck,
Oh yes, if your hifi store has used amp for sell, ask for a listening session with those. Or look here on Audiogon or elsewhere for used amp of quality for a cheap price. This is the way I bought my ss amp and tubes amp for low price.