To be clear, I wouldn’t rule out the best option because it has multiple inputs. I suppose I mean to say the "goldilocks" answer would be a simpler unit. Also I tend to switch over carts a lot (one of the reasons I’m very happily sticking with my SL1200G) so ease of switching loading/gain is preferred (soldering resistors is a no go! So are dip switches located inside the unit). For reference my carts are AT ART20, AT ART1000x, VDH Colibri Strad XGW, ZYX UNIverse III.
I would consider setting the Trumpet to MM setting and putting a high end SUT in front if folks felt that was the best option. I do futz with loading a fair bit though so I wonder if the limitation with the SUT and MM setting would be too limiting?
Doing some additional research, I think I REALLY like the ModWright PH 150, thoughts? It ticks all the boxes for me: Tube. Easy adjustments. Potential end game unit. Competitive price (compared to Allnic, etc).

