Sony no longer makes DSLRs but they do make cameras, which they call SLT, that directly accept A-mount lenses. Those lenses will work fully with any such camera. If you go with the full-frame SLT-A99 (high-end model), they will show exactly the same field-of-view as with a film camera. Otherwise, you can get a cropped-sensor model with a focal-length multiplier of 1.5X such as the SLT-A77 (mid-range model) or SLT-A58 (entry-level).

The other possibility is to go for a Sony mirrorless E-mount camera and buy an adapter, which Sony makes. One of them even has a built-in phase-detection autofocus system that lets those lenses focus quickly.

Those lenses are reasonable but neither the best nor the worst. At this point you should ask yourself if you want get into a compatible system, and for that I suggest you look at available cameras. They are very different from DSLRs of other manufacturers. This is not a bad thing at all; it is a different thing, with both distinct pros and cons. To decide you need to consider the type of photography and subjects you will be shooting, as well as what other lenses you would need and see if those are available.