want to replace my lms 480 in dash gps with a color gps that is the same size as the 480 and i want to stay with lowrance so i dont have to change any of the wiring or the antennae. was thinking about a 520c or a 525c. dont know if these units are the same size as the 480 or not and was wondering if there is anyone out there running these units and what they think of them.