I currently have a Canon 5D II and a Canon EOS 3 in the SLR world and picked up a Voigtlander R3M, CV 50mm Heliar f/2, CV Nokton 40mm f/1.4, and Zeiss ZM 28mm f/2.8.
I got the EOS 3 because I could use the same lenses as on the 5D II. What I love about the 3 is fast, accurate AF. What I dislike about both SLRs is the size and weight.
As I read up on rangefinder cameras, I decided to give the R3M a try. Things I like about it are small size, lighter than the SLRs, accurate metering, and the overall feel of working the camera. But the things I find a problem with are trouble focusing correctly, needing an external finder when using the 28mm, and sometimes wishing for AF.
I've read from a few different people where they've went through trying several different style bodies until they found one that "just feels right" to them. Right now I don't feel like any of these three bodies are the right ones for me. On the digital side I'd like to try out the Olympus OM-D to see if its small enough while still having arguably the fastest AF in the MILC world. I may rent first before committing to dumping the 5D II for it.
But I'm trying to find a 35mm film body that is smaller than the EOS 3 but has fast, accurate AF like it. I prefer something with interchangable lenses with good prime lenses and maybe a zoom too. And preferably something that has a good reputation for build quality and not prone to some kind of popular flaw like the meter dying or some error code that's common.
I would appreciate any ideas on what to consider for a film body given my wish list and my annoyances with my current bodies. As further background, I've been using the R3M since Sept 2012, and the EOS 3 for over a year.
I've had the 5D2. Still have an EOS3. I've also tried just about everything else in 35mm (and MF...), probably looking for the same thing(s) you're looking for. My take:
You're not going to find ONE camera system that is perfect.
I, too, have Canon because i think their (prime) AF lens range is the best in 35mm. That's why i've stuck with Canon for digital, having come from the EOS1 and 3 for film. But, i also have long wanted a smaller SLR, and have never liked the consumer Canon bodies. Too much lightweight plastic. I have always liked Nikon film bodies, though, and appreciate that the old metal bodies use the same lenses as the current AF bodies.
So, i've bought a few different Nikon film cameras. F6, F100, F80, F4, and FE2. But, i never intended to duplicate my full Canon lens range. That's where it gets silly. I've never had more than one or two lenses for any of the Nikons. At present, i still have the FE2 and F100. The F6 was beautiful, but didn't do anything more than the F100, so i couldn't justify the $1000+ versus the F100's $150. I have the F100 for AF, but it's really not smaller than the EOS3. When i want small, i use the FE2. That's my suggestion: don't try to duplicate the whole lens range for those occasions when you want to go 'small.' I use the FE2 with a 'pancake' 50/1.8 Series E for those occasions. When i think i need more/varied focal lengths, i just use the Canon.
So, for a small AF camera, i'd suggest the F80/N80. Get your most used focal length prime on it, and be done. When you need all the options, just use the Canon. It's only in the last few years that everyone thinks they're entitled to make images with tiny cameras. We have to sacrifice a little, don't we? 100 years ago, people were driving wagon trains across the wilderness to shoot 8x10s.