I've had a Whistler 1670 for years and it finally croaked. Has saved me countless $$ and certainly my license over the years. I need a new one and have read lots of opinions here today. Is there a comparitive RD to what the 1670. I live in FL and it is mostly KA here with some K. Only a couple of laser's I've run into over the past year. Is there a significant range issue between what I've been used to and the Rx65 & X50?