I shoot digital for color for most basic stuff. But I have a camera that doesn't have a Bayer sensor in it, so it deals with light and color in a very different way. It's great for trips and general use.
BUT...
My real "work" is mostly black and white and there I use medium format film. There's no comparison between a 6X7 black and white picture and digital. Because a black and white sensor would have to be purpose-built to be only that - no pattern at all. There are no such sensors on the market currently(and only a few dozen were ever made in the past), so you're stuck with Bayer losses:
0.66 in each dimension is the best that you can manage. Most cameras manage closer to about .6 due to consumer-grade software, AA filters, and so on in the mix (as opposed to Digital Backs).
6*7 is 2.36220" X 2.75591"
*note - IMAX is 2.072" X 2.772" - actually slightly *smaller* than 6X7!
Scanned at a bog-standard/basic 2400DPI even, that nets ~5670 X 6615 Pixels. Or roughly 37MP. Let's call it 35MP. Scanners can resolve better film upwards of 3000DPI, but this is a reasonable lower limit/expectation with normal film and an inexpensive flatbed scanner.
To get that result with a Bayer sensor, though, the conversion in interpolation factors come in. You have to multiply those numbers in each dimension by 1.33. That nets ~7560 X 8820 to equal a mere 2400DPI scan. A bit over 66MP. Let's call it 65MP. Modern post-processing and pixel binning and other techniques can fudge this to closer to 45MP for color, but black and white is unforgiving. Doubly so when you consider that most good black and white slide film can be scanned at closer to 3600DPI without major issues. (or essentially 100MP+)
Large format is stupefyingly huge, of course. It still has no equal.
Whew. All of that said, my sincere recommendation would be to not spend money on a medium format DB system and move directly to large format for your work. It's slower and more tedious, but for scenery and carefully composed/non-action shots, it's still in a league of its own. Especially in an exhibition.
Note - if action or spontaneity is required, a 6X7 camera and film, especially for black and white, is more than adequate.
Both options can be set up, including a scanner, software, computer, lenses, and camera, for less than the cost of just the digital back for a MF system. Unless you shoot hundreds of photos a year, you're better off with film.
