My husband mentioned getting a GPS unit for the RV that is geared to truck and RV use. He mainly wants it for height restrictions (I think). I thought it would be a great Christmas present for him if I can find a good one... Can anyone recommend one? I know he is a Garmin fan. I found a Garmin 465LMT but it seems to have mixed reviews. It seems that most people reviewing it are truckers... Not much feedback from RV users.