I think you should decide between tubes and transistors, then pick whatever seems like a good idea. I'm in the tube camp as they sound more musical, and music is what I use my rig for (except for sometimes listening to Harry Shearer's show)...a great tube amp is every bit as snappy and "fast" as one could want, and SS amps often note that they're designed to sound like tubes...SS amps don't require buying tubes so they have that going for them, but, with the possible exception of Nelson Pass' recent SIT based amps, transistors generally aren't so tube-like as hey...they're not tubes. It's all about that pesky harmonic content issue, and that bears consideration. There are obviously plenty of choices out there from either camp, but one clear difference is you can swap tubes out as a taste decision, but rare is the audio freak who swaps transistors.
