Terry,
I am wondering if you (or anyone else) have compared the GroundMaster City/RouteMaster to the Synergistic Research Ground Block?
Puritan Audio Labs GroundMaster CITY & RouteMaster grounding system
My review on the Puritan Audio Labs GroundMaster CITY and RouteMaster grounding system has just gone up on the Stereo Times website. For all the details how this complete system for less then a $1000 can dramatically improve your system, take a look at the review. This grounding system is one of the greatest bargains in HiFi. Nordost makes a star grounding device that is no better in its influence on a system, quite good indeed, but charges over $5000, compared to the Puritan Audio Labs system's reasonable pricing.
Terry London/Teajay