Why not a jump to win8? I've had centrafuse and RR and didn't like either one. Iguidance hasn't had an update in nearly 2 years. I just put win8 on my carputer and love it, it's a LOT more fluid than any aftermarket touch interface, and when streets and trips releases a Win8 ready version I'll use that for nav.

I like the full digital idea tho. I'll be running optical to my DSP and RCAs to the amps. Can't wait to see how this all turns out.