I currently have a 35mm format digital SLR (Canon D60) and a Pentax 645N and am wondering whether to upgrade the D60 to the Canon 1DS or stay with the 645 and use both film and a digital back, if one is available. Anyone know if there is a digital back for the 645N or if one is planned? Would it be portable (i.e. for outdoor use) or not? What sort of price range?

I shoot mostly macros, botanical, gardens and landscapes; I am a supplier for both traditional and digital stock libraries and am intending to approach magazines on a freelance basis in the next few months too, so any advice on this dilemma would be much appreciated.

Regards,
Caroline