One can buy a 396LMT for $250 and put topo on it. Or..... for a whole lot more money, one can get 680t and put Street Navigator on it. I see a lot of guys using the Montana off road, but why for the price difference. I've called Garmin, GPS City and Tourtech , besides reading a shit load of threads on ADV, and cannot figure out why people are buying the Montana over the Zumo for off road. Can someone with real world experience shed some light on this for me. Tourtech's big sale runs out tomorrow and I'd like to take advantage of it, but only if it makes sense for off road.