Agreed - calloway mentioned the GE PC, not the Matrix; hence, the reason for the comment originally.
In looking at the SS website, a 2M Signature PC goes for either $1550 or $1790 (high current version), whereas Bob's Graphene Matrix goes for $1049. I could see a Signature used for around the price of the GM.
However, the SS Music Reference PC goes for either $2985 or $3375 (high current version). That's three times the price of Bob's GM PC's.
Comparing the ~$3K SS Music Reference PC to the ~$300 GE PC - well, if it's not significantly better (or at least somewhat better) at 10X the price.....
Dave