Hi,
I shoot with the RZ67ProII in the studio and the 645AFD/III on location.
I like both systems, but image/quality wise the RZ is amazing, the quality is real 3D like and pinsharp.
Working with the RZ can be troublesome, it's a heavy camera and focussing is not easy with the standard glass (I use a highpower focussing glass) but when everything works it's a camera that will reward the photographer with wonderful quality.
By the way I mainly bought the TS for focus effects which in my opinion are not as real/good in photoshop as with the TS.