why the CMOS requirement? I understand for landscapes, where liveview for critical focusing is very handy particularly with a manual focus or techcam, but on an H body and shooting people I'd maybe think differently
I think P1 did the IQ150 and 250 in H format. Not sure if the 350 was, but then you are going to find those a little hard to get hold off.
Personally (and I was inches away from this setup myself) I would go for an Hx body and P65+ back.