I used to have a pro1d until it met with an accident of my making. Replaced it with a hoya hd- the coating is a big improvement and functionally it's great. The B&W 105 is also great so imagine the 77 is the same.
I would either go with the hoya hd or the b&w. Don't think there is much between them- things to look for in CP's are the coating, thickness for vignetting and also if there is a front thread if you intend to attach an adapter for GND's etc.
At these levels there's not much between them- heliopan etc- they're all good