Again this comes down to the manufacturer. Now all products provide the same sound quality. You need to determine first the sound you are looking for. There are many different tubes that all have different sound and there are different amp designs such as Class A, etc. Your budget also have something to do with it.
As far as comparing SS to tubes, you will get similar answers on the differences here, but in reality, a good tube amp design will be equal to SS in terms of dynamics and slam. Tubes in general can offer a longer decay of notes and more of a 3D soundstage that SS cannot provide.
You need to do your research and listen to different tube equipment and learn why they sound different. There are plenty of custom designers around if you want to go that route also.
As far as reliability, sure there is heat but that is where the design comes into play. Point-to-point wired? Bias adjustments? Tubes wear out sure - so do capacitors and resistors. I do not agree with less bass impact comments. It comes down to the tubes and the design. SS has limitations that IMO compromise sound quality.
Happy Listening.