That and the C65 has absolutely no software, no OS (beyond the Basic CLI) and wasn't even finished.
Personally I prefer the normal 128, the D(CR) reminds me too much of an old clone. I think the rarest would probably be the 128CR - a wedge 128 with the DCR motherboard and chips, minus the integrated 1571, read about it on one of those obsessive C= fansites, can't remember if it was released or just prototyped.