I like the Minolta X-570/500 and X-700, myself, but all of the major camera manufacturers produced models that will perform well.
AEL: It has to have AEL (auto-exposure lock) for me to even consider it. Minolta made some fine electronic automated cameras previous to the X-700 generation, but they didn't have AEL, so they didn't work for me.
I like aperture-priority automatic because the shutter is then timed steplessly, providing - at least in theory - a more exact exposure. (The equivalent is true in all forms of automated exposure.) I scan the scene for light values and I lock it on the part of the scene that provides the settings I want. Then I recompose and shoot.
Without AEL, you don't have much control over exposure. Dialing in exposure compensation takes longer than it would to use manual exposure, so I have never bothered with it.
So, I find any automated exposure without AEL useless, which rules out a lot of cameras for me. You might want to take this into consideration based on your own technique.
- Murray
PS. Responding to Joe Lopez's report of his X-700s dying: When these cameras fail, it is almost invariably a certain capacitor that requires replacing and is a simple repair. As far as I know, failure of the entire circuit is rare.
As I indicated, my bias is Minolta, but competent SLRs with aperture-priority automation were offered by almost all of the known brands. You may want to determine which features you want in such a camera (AEL or not, ergonomics, etc), in order to make your decision.