i know springfield makes some models with ambi safetys, maybe kimber. my first choice would be a kimber, springer being 2nd.
avoid the taurus, because if there ever is a problem, you are both screwed. my advice is s.a. or kimber, then you have truely given you father a worthy gift. after all, he deserves it, right?
give yerself a pat on the back as well. it aint just every son that gets dad such a gift.