Gilles -Robin gets good mention from folks I respect (Jim Cowan in
particular). Remizières is supposed to have very good terroir, though
they have moved to a more modern style that might not appeal to all.
Claude, the master of terroir, is probably the person to ask.
Apparently Crozes is the largest Northern Rhone appelation, and some of
the more recently added part (I believe in southern part of appelation)
is flatter and with a different soil. Claude probably knows who owns
what.