Well after using both the RX-65 and the V1 for about two years now I've decided to go with another V1. The reasons are:
1)the V1 stays on the windshield! I'm tired of walking out to the car and finding the RX-65 lying on the floor. Nothing is more frustrating than to spend over three hundred dollars on a RD and have it fall of the windshield. The $99 whistler I used to have never fell off the windshield!
2)the rear antenna. I like to know where the leo is,
3)I don't see a big difference in sesitivity ("false alarms"),