I have been using Mamiya Rb & Rz's for awhile now. I do have an older digital back, yes it was VERY spendy. It is used mostly for studio work (products) as it needs to be tethered to a computer by fire wire. As for film, I use Ilford Deltas for B&W, Kodak Portra both NC and VC, but of late, Fuji Chrome. I process myself and find the transparencies are easy to do. No real darkroom needed, just a processing tank, a GOOD themometer, several jugs and a real dark closet to load the tank.. and a timer of some type. I have had pretty good luck with the Tetenal chemistry. Less steps, less chemicals, less time and MULTI use. I do have a regular darkroom but still like this process over the Kodak. Both B&H and Calumet carry everything you might need. There is something rather old school and special about processing yourself. I remember when just about everyone required med format or 4x5 slides for publication, now it is all digital. As mentioned above, you will need a GOOD scanner for the slides when done. I guess with todays post production and editing software, color balancing is moot. Take a visit to the APUG site for a little more info.