I have 4 radar detectors and I only need 2. Which ones should I get rid of? I have a Bel STi Driver, a Passport 8500 X50, a Whistler Pro 78, and a Vector 965. I live in NC and I sometimes go to VA but I have a kill switch so if I were to see a Leo, I can just cut the power off my RD and it wouldn't get picked up. My wife likes the Pro 78 because of the blue display and the amazing quietness (probably the quietest out of all 4). What 2 rd's would you keep???