deercamp,
My friend and I both have the rino 530Hcx and it is a fantastic unit. I would also not opt for the 100k maps when you can get much better maps here. Garmin's base map is decent but for the scouting you do, you'll want more detail. Also the maps at least the topo 08 from garmin is aggravation because the streets do not line up at least in AZ, at least 2-3 hundred feet off from where they should show up. The maps on this site are multitudes better! my 2 cents.
My friend and I both have the rino 530Hcx and it is a fantastic unit. I would also not opt for the 100k maps when you can get much better maps here. Garmin's base map is decent but for the scouting you do, you'll want more detail. Also the maps at least the topo 08 from garmin is aggravation because the streets do not line up at least in AZ, at least 2-3 hundred feet off from where they should show up. The maps on this site are multitudes better! my 2 cents.