I'm looking to move away from my Nikon DSLR kit and to focus more on my GX680III, GW690III and potentially a 4x5 camera in the near future. Having said that, I do get the occasional paid work (for the golf club I worked at throughout uni, nothing special!) that requires a digital workflow. As such, I'm looking to get a digital back in a Mamiya 645 mount (I plan on getting one at some point), that will be used primarily on the GX680 with an adapter. I've got the Phase One One Shot adapter for the 680 so I could use a Phase One back, otherwise a Leaf Aptus looks pretty compelling too.
I have a budget of around $3000, and am hoping that some of the experienced guys on here might have used a P25 (or similar) or a Leaf Aptus 22 (or similar) in the past, and can make some recommendations. Better still, if anyone has either of these and rents them out from time to time, I'd be very interested in renting for a weekend!