Well sort of... I had an ABM500 1x15 combo and 1x15 cab, and switched to a TC Classic 450 and Barefaced Midget and Compact. No regrets. The Classic is a dumbed-down version of the RH 450 (no memories, no tuner, fixed EQ frequencies). It's plenty loud, so the 750 should be er... 300 louder.
I did look into the RS cabs but decided to go for lighter weight. According to TC you can run up to 3 8-ohm RS cabs from one of their heads (but only 2 'other' cabs).
EDIT: Worth considering a mix of cabs to give yourself more options for different venues / rehearsal / home use.
**stands back to allow RS cab owners to have their say**