I didn't find MY Perpetual Calendar, yet... THe MC 8 Days Skeleton is an awesome choice, yes, but I would prefer something slimmer...
I have my eyes on a Vacheron PC Skeleton, in platinum, but the beast is a bit pricey...
This RG Reverso PC is a very tempting choice, and has a big advantage: It houses a manual movement which is very interesting.
My favourite may well be one of these 2, or the MR, or the Chrono...
The tourbillon is superb, but my favourite is the Platinum Nr 2 Skeleton, my absolute Champion, when it comes to Tourbillons, along with the Gyro I and the GP 3 Gold Bridges, and the Omega tourbillon Central.
I would say that my favourite is the Geographique...
Best,
Nicolas.