I’ve had TC RH450 & 750, GB Shuttle 9.2, Aguilar TH500, Darkglass M900,GK MB Fusion, and used a RM800 in a rehearsal room a few times. My two faves were the MB Fusion ,I kept it far longer than I kept any of the others, and the RM800. I would happily gig any of the others again if I had to, I didn’t really dislike any of them. The RH450 was probably my least favourite. To my (cloth) ears, the 750 sounds so much better. Used them all with the same Barefaced Big Twin 2 cab. I’m back with heavyweight heads now, been using a EBS TD650 for a while and it’s fabulous. If I want something a bit lighter, I think I’d go for a ABM600.