Rekon, I think you just anwered your own question! I simply think it's a much much better deal to go with quality digital pre, and quality 2 channel preamp, looped together. Whould I spend $6k on a tube multi-channel pre?...no. The reality is that the Cary pre/pro (is it really a processor built into the unit,or just a multi-channel preamp?), isn't going to be any significantly better sounding, probably less, than a good quality used tube pre, in regards to 2 channel. With better tube compliments, the sound is going to be as good as one could expect in some of these used, sub $1k, tube pre's, from Audio Research(ok, a little tubby in the bass), Copeland, old used Cary even, and many others, for less money! Again, for $450 used, you can get a great sounding Acurus Act 3 digital pre/pro, and some used tube preamp (2 channel dubties), with the right tubes, all for a much better deal, maximizing both 2 channel and 5.1 channel. That's my choice anyway.
No, I've not heard the Cary piece in mention. But I've heard enough gear over the years to know what's what.