I had a long range telescoping antenna and broke it, its too long when fully collapsed for rough terrain and rushing to get to the tree!! I also have burnt up one receiver with my marine radio, Garmin will cover it under warranty but only once, if yours is out of factory warranty its $175. I still have my truck mount but I mostly use the telescoping antenna that mounts directly to the Astro and folds down beside it when not in use....It will even fit in the case with it on there.........I've read a lil about the new 320 nothing set in stone though its supposed to have touch screen and be red in color lol if that helps any all the other stuff I've heard is stuff people are asking to be changed on it.