Garmin makes some good units. I have the Etrex Vista by Garmin. I love it. Easy to use interface. You can download all sorts of maps (topo, road, lakes) to it. It has never left me lost. It is a little pricy. About $300. I recomend them to anyone looking for a good GPS unit, but I am, not going to part with mine.[:-]

http://www.garmin.com/products/etrexVista/