So, tube amps. I've got 'em, many of you have 'em. The various amps on the market all sound different, each has its own flavor. Here's what I try to look for in an amp: 1. First, how does the darn thing sound? Is this a tone or set of tones I want to live with for a long time? Is it different from what I have, or does it sound too much like one of my current amps? If yes to both, move on to the second thing on the list. 2. How well is it built? Will it hold up over the long haul? Are the materials, cabinetry and parts of high quality? F'rinstance, MDF cabinets are an automatic disqualifier for me (YMMV). Is it hand wired (bonus points) or at least high quality, heavy duty PCB with solid standoffs? There are plenty of 'gut shots' on the web for nearly any amp, so you can see the innards before you go shopping. If well-made, go to the next thing on the list. 3. I like to be able to tweak the tone of an amp subtly to match my musical tastes. Can this be done with different tubes, or speakers, or is its potential maxed out with whatever it comes with? This, admittedly, is difficult to know in advance, but I do ask around. Sometimes I even find out! 4. Is it available as a head and separate cab, or am I stuck with a combo (I've learned the hard way that heads and cabs are easier for me to move around than a heavy combo, so I bought my last combo 6 years ago)? 5. Do I actually want to look at this thing for the next umpteen years? There are some weird-looking amps out there, but some are both nice looking and great sounding.