I also have the Cobra 75wxst. I like the weather radio option it has as well. I just wish I could make it monitor for alerts while in CB mode...

For the Antenna, I have the Firestik Firefly 3' on a fender mount with a spring so it's less likely to get taken out by a branch in the woods. The best SWR I have been able to get is about 1.2-1.3, but it still seems to work pretty well. I might try a 4' antenna one of these days to see if I can get a better swr.