Just to chime in here. I believe that tubes vs solid state is a matter of budget and price point. Low level solid state amps sound bright if not designed and constructed correctly. Low level tube amps sound warm, until you realize that something is wrong with the sound also. But, top of the line amps, either solid state or tube? I'll tell you seriously. I have listened to top of the line amps and I'll take either. Audio Research Reference 610 amps vs Boulder top of the line? Can't pick. They both sound wonderful. I listened to Krell amps for a time and still find them too bright. Switched pre-amps and still bright. Switched amps, to a Mark Levinson amp and brightness went away. Here is what I have learned over the years. If you stop listening and don't know why, something is driving you away from your system. But, if you can't wait to turn it on and listen for hours, then it is just fine.
enjoy