Bob, your music is awesome! Your production skills are mind blowing. I'm afraid to think about what you would do if you had enough 'spare' time. Incase you don't remember, I sold you the legacy head a couple years ago. I've just picked up another one to give it a second chance.
At first I was a little disappointed with the 2nd one... but things are improving. I got my tubes and my Hotplate today. Wow, it's like night and day. The hotplate is awesome... and it really puts out a lot of heat, which is okay on these cold New England mornings! To answer my own question above, if I want to run a second speaker cab, I would need to get a second 4ohm hotplate. One cab is plenty for now, so no worries.
The tubes sound great, and I opted to just pop them in myself. I may take it to a tech later to have it fine tuned, but initial impressions are good. Reverb still isn't working though... I was hoping it was just a bad preamp tube. Anyway, thanks to Gresh and Eddie for the advice! I'm very happy with my amp. So are the neighbors, thanks to the hotplate.