Yeah, the 705 is horridly expensive, and the 305 can be a bit finicky under heavy tree-cover or behind mountains. Only reason I've stayed with the 305 is that's nice to be able to save routes for future reference (before I got it, half the time I had no idea where I was if I was following other people), and near the end of rides, it's nice to be able to see how far away from the car I am, or what general direction I need to go in to get back to the start.