I use a Leitz/Minolta CL in my mini, take-it-everywhere system. It's tiny, even with two lenses, flash, meter, etc. and offers no compromise in image quality over my best SLRs.

I would have suggested it to Robert but I don't know if it would suit his needs.
The 40mm Summicron/Rokkor C lens is pretty slow at f/2.

I really love it though.