If you want the Zeiss/Zeiss Ikon SLR experience without the pain, you could try the Yashica/Kyocera Contax or a Rolleiflex SL 35. Oh wait -- I said without the pain. Better remove the Rolleiflex from that list ... at least the bodies made in Singapore.
Some of the Carl Zeiss lenses were also available in the Rolleiflex QBM, and they tend to be slightly lower priced than their Contarex counterparts. Not all of the lenses are available in the QBM. You just have to find a working body. The SL 35 M seems to be semi-reliable, as well as the SL 35, which is a very basic body.
Sorry for getting way off-topic again, but since Rolleiflexes were brought up, then...
Personally I don't like the Rolleiflex SL35: I find that the Pentax Spotmatic, which it more or less imitates, a far nicer camera. Also the SL35-M is pretty junky and plasticky. The Voigtländer-branded SL35-M (VSL1) is a bit better built and has more metal parts (notably the shutter speed dial and its bearings).. Still not a camera I like, though.
My Rolleflex advice - however debatable - is the SL35-E (or Voigtländer VSL35-E). While wildly unreliable when it first came out, and today many are still affected by an electronic problem which manifests itself as a "lazy mirror", if you find one which works properly, it is likely to keep working.
That said, a working SL35-E is actually a very sweet camera.
The other alternative is the SL3003, aka the Motorized 35mm Hasselblad:
Interchangeable backs, 2 viewfinders, Hasselblad shape.
It is actually derived from a Zeiss-Ikon project for a futre Contarex, which Rollei bought & developed, so you "WOULD" be getting a Contarex after all.
Caveats: Rather big, Accumulator management needs to be very careful, reliability so-so, being cynical one could say "The size, handling and cost of medium format with the quality of 35mm"
On the plus side, a weird and wonderful beast which has the charm and quirks of the "Bullseye".
If you were looking in general for a great classic camera with character which is also an excellent (exceptional) user, then "the camera I have" which I'd recommend is the Leicaflex SL or SL2