Is there a mode that lets me set P and A?

Agreed, Pentax is the only company that implements this properly.  The other common method is over-riding M to allow auto ISO, but then it is no longer M mode and this will burn you when you think you are in M and find out later the camera was setting the ISO for you.

I think it is a very important mode for any camera to have (my second most used mode after A).  My Samsung does the auto ISO in manual mode, but not sure what NEX does, my NEX 3 does not allow this mode at all, but don't know about the newer models.

Eric

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