After doing a little internet research, I just bought the Standard Horizon HX300. The guy at West Marine said that was the best one for the price. I also bought an Aquapac waterproof bag to carry it in. This is my first VHF radio, so I don't have anything to compare it to, but it seemed like a good blend of features and cost. It was about $120. The HX40 is smaller and looks like it will fit better in a PFD pocket, but it doesn't have a replaceable battery.
The Connyak BBS