I use a Minolta MD 50mm Rokkor-X f/1.7 with my Sony NEX-5N, and absolutely love that lens. It's actually my favorite lens, even though I only paid $66 for it (including the adapter!). Many of those old Minolta lenses produce fantastic colors and sharpness, and if you are comfortable with manual focus then using them on a modern DSLR or mirrorless camera would be no different than using them on your old film camera (except that you don't have to worry about wasting money on film for bad shots).

If you want to use your old Minolta lenses with a modern digital camera, you only need to make sure that you get a camera that has a shorter flange distance than the original camera had. The new Micro 4/3rds cameras, the Sony NEX system, and the Samsung NX system all give you the ability to adapt those lenses (though I'm not sure that there are many adapters for the Samsung NX system, as the demand for it isn't as high as m43 or NEX).

Each of these systems has its advantages, and you should spend some time reading up on the reviews before you make any decisions. I chose the Sony NEX-5N, and have been extremely pleased with my decision, but many people prefer the m43 cameras for their particular benefits. Not only could you revitalize your old lenses, but you may find yourself buying into a completely new system before all is said and done.