if I were in the Whedonverse, I'd get some friends, or people who know magic, together, get myself vamped, tied down while I was out, and when I came back as a vamp, have the others curse me with a sould before I did anything really bad to make me all broody and mopey. Thus, I'd have vampire powers but no evilness. I never go out in the daylight much anyways.
It'd be perfect if Angel hadn't smashed the ring of amara...bastard...