My votes go to (in no particular order):
Gina Davis
Colette Nelson
Dena Westerfield (off season)
Debi Laszewski (off season nowadays or generally as an amatuer FBB)
Monica Mollica
Amy Pazzo
Christine Roth (just beats Dena to the title of the 'Queen of Pout')
Denise Rutkowski (in her hey day between 1991 - 1994)
I am only counting (those that I can recall thus far anyway) those women who I only need to see their face (at their best) to 'get me in the mood' - they don't have to be 'classically beautiful', its more the 'look' that to me is a different kettle of fish (hence why I haven't included some, like Jody May [who happens to have a very sexy body, but that's not what the poll is about]), though some are both.
For me, probably a toss-up between Gina and Monica. All of the above would also be featured in my "sexiest body" list (with a few others) as well.