Most of my mountain biking (and hiking, for that matter) is done in the woods, where there tends to be pretty thick tree cover. On some of my longer trips, especially when I'm on trails new to me, I like to use a GPS for various reasons. The problem is, the GPS I have has an awful time getting and keeping satellite signals while in the trees.
The GPS I have is a Garmin eTrex Vista that is three or four years old. My question is, would I get significantly better signal reception if I replaced it with a newer $300-$400 model, or is reception going to be spotty at best while in the trees, no matter what?