I'm having a hard time knowing which 32GB CF card to buy for my Phase One P45+ digital back. I shoot on both a Sinar view camera tethered to a Mac, and a Phase One 645 DF+ for my landscapes. This would apply to my landscape shooting.

I posted this question on the Phase One forum, and was told that the technology at that time was compatible with UDMA6. But I couldn't find out anything more. Almost every card availble now is UDMA7. The only UDMA6 card I can find costs more than most of the newer ones.

Does anyone have experience using a UDMA7 card on a Phase One P45+ back, or know if they will work? And which transfer rate to buy: 60, 90, or 120 MB/s?

Thanks for your help!