I noticed that Beltronics discontinued the RX55 and prices are dropping from the $229.95 price. Bestradardetectors.net has them for $169.95 now RadarBusters has not dropped the price yet and I have even seen some on ebay new for $139.95. The Pro-78's are at the same price so which is better?. I know the Bel 955 and Pro-78 are very comparable but is the RX55 supposed to be a step up? I need a decent detector for a friend and I was going to do another Pro-78 but just noticed the drop on the RX55.. Tell me which is better?