Herman:
I'll have to look up the new antenna, I get such good reception with the 28db it is hard to imagine needing a more powerful unit unless you drove a taxi in New York City when the depth of a large city.
I bought mine back when I was using a 76C, usage dropped once I got the 76Cx and the 530HCx. Usage has picked up some with the use of an automotive c550 Street Pilot. The c550 will normally do okay without it. With new laws being enacted regarding the mounting of an automotive gps units reception becomes tougher. I just made up a mount for my c550 taking advantage of an unused pocket in the dash of my pickup. Out of luck with the wife's car.