I currently have a VX-8DR (with an external GPS attached). I bought it used, and it has been acting a little strange lately. Before I bring it in for a repair, I thought I'd check to see what new models might have been released lately - perhaps something digital with APRS and a GPS. Can anyone recommend an upgrade from the VX-8DR, or is this the best I can get? I'd use it for just about everything at some point, but it must be a handheld. I may also pick up something identical for my son. Any recommendations?