Just tried out a bunch of stuff- super fun trying the recommendations you all had as best I could.
I tried the GK MB200. It was great, just sounds similar to my GK Backline 250, (but better, smaller, more power). They had a used GK Fusion Mb800 which I thought sounded VERY good- I liked it more than the MB200.
For whatever reason the TH350 didn't do it for me but I gave it a shot. Probably the way I was dialing it in (or not dialing it in) but I couldn't quite get happy with it.
I tried a Rumble 500, which I couldn't believe but I really liked. I went in thinking I was going to gravitate toward something more exotic, but I have to admit it has a great sound with this cabinet. One thing that gave me pause was when I pushed the vintage and countour buttons on this (new) unit, it was really scratchy like it needed some electrical cleaner. Was surprised to hear that on a new head?
Finally tried the Mesa D800, and really liked it as well. Great sound, simple, small and light. Dialed in some great vintage tones as well as nice clear cleans.
They had a bunch of other great stuff I wanted to try but I ran out of time. Thanks all for the advice. Haven't made a decision but this thread has been very helpful- thanks again.