If you are just curious, find someone in your area who has some tube equipment to listen to. How much you like the sound will depend on several factors. What are you listening to now? If you have a high quality solid state amp with appropriate matched system, that sounds good, you may go...meh...when you first hear tube sound. For me, it was the early 80s and I was listening to those awful first compact discs, with just so so solid state gear. I had lost all interest in music at that point. Found some tube amps, dove in and rebuilt them, and my music enjoyment came back. Later found that the small power tubes seem more musical than the larger power tubes (6bq5/EL84 family). It is hard to find a bad sounding 6bq5 amp, as they say, and I agree. If you need more power, EL34 and 6550 can also sound good, maybe not as "sweet" though. I have many amps including Dynacos, and have heard the newer kit versions, I think they sound every bit as good as the old, and will be reliable, being new. Why not get a kit, and you can learn all about em. Do a nice job, and your amp will retain its value and you can always pass it on, if you decide to. tubes4hifi has great kits.Dynakitparts has an ST-35 (EL84 based) kit.