MooseKnuckle - I have a handheld Garmin etrex GPS receiver that you are welcome to have. (I don't know if handhelds are valid for the rebate). It was run over by a truck and it is totaly useless. PM me if you would like to get it.
James, I took wife to Boat US last Sunday and showed her the larger GPS's in color, she liked the 10" better than the 6" and better than the 4"
I'm thinking it is worth the extra money for a larger color GPS. I looked at the 172 but noticed the 182 has a larger screen size.
Last weekend I came back thru the middle channel from Metro looking at my small handheld gps and ended up going outside the channel for a short distance. No markers were up yet. Larger GPS would of been nice.
Cheep Price found so far on Internet including EBAY: