Stephanie, aperture priority AE is about the only auto function on my Zeiss Ikon - & there's no reason why you have to use it. Set in manual mode, it's a fully manual camera & you'd never know you had an auto-anything camera if you didn't look at the "A" on the shutter speed dial.
If you buy an M2, you'll be sacrificing a meter - & it certainly can't hurt to have one available. The Zeiss Ikon meter is spot on in my experience & the camera itself is beautifully built. In addition, you get 28 frame lines on the Ikon & a better viewfinder. If you like this camera except for the AE function, I don't think that should get in your way.