Chedo: What is the rest of your system? It's a hard call because tubes really do it for popular and traditional acoustic music and class "A" is great for classical, especially if you have the power/current reserves for musicical peaks. There are also many different tube sounds to choose from depending on the size of you room, the volumes at which you listen and your speakers. Stating your budget will also allow the experienced ones at this site to make real world suggestions (I am not a part of this group assuming that your budget is a plump one). My only long term experience is with push/pull tube and class "A" and "A/B" SS amps. I am learning about SET 2A3's, 300B's and other varients using EL34 etc. tubes. Getting good results from the latter group is very system dependent, and requires careful planning, but it is worth the effort from what I have heard so far. It's a good thing that I have a moderate budget or I would never be able to make up my mind, I mean you have to commit at some point.