The 110mm

has awesome bokeh (sorry this example is a little soft due to me) and only very tiny barrell distortion and has a 3D look shot wide open.
.
The 127mm

has awesome bokeh and ZERO barrell distortion and is amazingly sharp.
The 180mm

renders fine details very well without being too harsh fro the face.
These are three 3 awesome lenses.
The 150 C SF

is a must have classic soft focus for the RB. While it can be mated with the RZ, I read somewhere that C lenses shutter trip mechanism is too stiff for the RZ body to safely accomodate.
BTW, I have the 210 APO preliminary found it *may* be too sharp/contrasty for adult skin. I think its a landscape lens?
Inspect all purchased lenses carefully. There are alot of new old stock Mamiya lenses stored in boxes which is not ideal for fungus prevention. I have rejection rate of about 15% on these new old stock lenses.
On a positive note, the Mamiya RZ offer awesome optics despite their large, clunky appearance.