I have a few myself.........
The MD lenses will work better with your XD11 (if having all exposure modes is important to you).
I prefer the build quality of the older lenses myself. I have all the MCs but the 80cm F8 RF and the 100cm RF.
Plus a few MDs. They are all excellent.
I bought it NEW in the original box, so it needs to be restored. New foam seals, interior lubrication, etc.
Never used! It functions, but when continuously firing with film, will seize up. Tap it on a table and it resets and continues firing. BUILT LIKE A TANK..................