The solid state Pass Aleph series has a reputation for tubelike sound. My Aleph 3 has a smooth, liquid, indulgent midrange plus feathery highs and decent lows. While the Aleph series is now out of production, there are a fair number for sale in the used market, and they are built like tanks and should last a long time. If you can get by with 30 watts per channel, the Aleph 3 stereo amp might be a good choice. There are other models with higher power, as well as monoblocks. I urge you to find one to listen to, so you can get a first hand impression of their sound. The Pass Labs web site still has info on the Aleph series, try the following link: http://passlabs.com/aleph.htm. Good luck.