FWIW, I called Luke on Tuesday to ask about replacing the 2 year old/50k mile Yokohama AVID H4S's on my car; after a brief discussion of alternatives I will be going back with the same tire. Several people here have them and a search should turn up my original thread about them in January of 2004.
I'm not familiar with the other tires you listed but will say that I wanted a quiter ride than the OE KDW, longer life than the Ecsta 712's I had previously, and generally wanted a more compliant, daily-driver-friendly tire than either of those two.
I'd definitely like to hear feedback on the Avon though.
