The Rollei models are multifarious for sure. Basically, any Rolleicord with a Tessar or Xenar should be a good shooter subject to the limits of those lenses; the complications are in the Rolleiflex models. Basically, I think you're safe with the Automat models and with any model that has "2.8" or "3.5" in the name; those are the ones that don't have strange gotchas like nonstandard formats or unworkable autoexposure.

I'm a TLR believer personally, but some people find them awkward. Nothing in medium format, other than folders, beats them for portability, though, and for those of us who like them, their restrictions are virtues.

-NT