Garmin Legend
I would suggest a garmin legend, right now you can pick up one from basspro or cabelas for 170. They have a built in hwy and road maps with it and if you want you can purchase addition maps for the major lakes in the US. The hotspot maps give lake contures and channel markings. It helps to save on purchasing several maps. My only suggestion to you in your looking. Is to make sure that it has WASS enabled. This gives you a more accurate location to with in 3 meters of the position that you are looking for. The ones without I believe get u within 20 meters. If you got any other question let us know.
Ted
Neither snow nor rain nor heat nor gloom of night will keep me from crappie fishing!
2010 Lake of the Ozarks Super Slab Champion