I had the RH750 many years ago. There was something I didn't like about it (aside from the drive - I've never liked TC drive sounds).
Just seems a bit meh. I loved the idea, the compressor, the EQ channels etc, but I never could get a sound I liked. Might have been the cabs I had (MB 1x12s I think).
I'd like to try again with my current cab, but I have a bigger yearning for a big transformer amp. Maybe an ABM or something for a change.