I had a Michell for many years gradually moving up the chain from a Gyro SE,to a Gyrodec and eventually to a modded Orbe. I used a variety of arms starting with a Rega 300 and then a RB 1000 and ending with a Triplanar.IMHO,the Michell is a truly special TT that is extremely finicky to set up (eg the gap between the felt washers and the bottom of the spring loaded chasis has to be 2mm). Properly set up the Orbe has a sense of air and finesse that I intially found wanting in the TT that replaced it :the TW AC 1. If you have the urge to upgrade, would strongly recommend that you demo the Raven or its more expensive sibling the TW AC 1.
Cheers
Pradeep
Cheers
Pradeep