I am looking at APRS setups for putting in my truck. Right now it seems like I am torn between getting a NUVI 350 and the OpenTracker2, which would be cool since it can plot the objects on the map and support APRS messaging. On the other hand I am looking at just getting the TinyTrak4 combo with GPS, which that would be a headless install essentially. Does anyone use APRS messaging? Is it worth the extra money, or do most people just run a tracker headless?