I own an AE1 and love it. It has a great feel to it (imo). So naturally I'd suggest that

The FTb has a reputation as a really great camera. To be honest, that's the one I'd play with first.

Trythis, the AE-1 has aperture priority as well. with prices what they are these days, I can't see a reason to chose using an A-1 over an AE-1.