I have gone through a similar path, with an old Contax system from the 80s, and a Canon DSLR system now. I recently got an adaptor (with AF confirmation) and will test it out with my old Zeiss lenses soon. But there are some things you might want to know as you along:
- unless you're getting a (more expensive) full-frame DSLR, the sensor is smaller than a 35mm film frame, effectively narrowing the field of view of each of your lenses. This is commonly called the crop-factor. With most Canon DSLRs, the crop factor is 1.6, so for e.g. your 50mm would be similar to a 80mm on your old SLRs
- because the sensor is smaller, the focusing screen and image in your viewfinder is considerably smaller (worse on a 4/3 models such as Olympus with a crop factor of 2). I live with it cause I can't afford to go FF (full-frame) yet, but it's a bit of a pain. The viewfinder magnification on the budget Canon DSLRs is lower than for the semi-pro and pro models (it is significant for me).
- no split-image/microprism. Since DSLRs are all autofocus, they never bothered with these, so manual focusing is more difficult. If you get an CY-EOS adaptor, get one that enables focus-confirmation.
For DSLR detailed specs and reviews, I'd suggest www.dpreview.com.
Don't abandon film, it's still a lot of fun