Fishing buddy - I reiterate choice of the Lowrance iFinder H20c. I would search the internet for a better deal on the unit than Cabela's, but if you go to the store check it out first. I saved like $65 bucks vs. Cabela's by going with an internet shop when you factor in the cost of the MapCreate package they offer.
BTW -- the Navionics Hotmaps Premium East Winni map is awesome and the MMC card works in the handheld iFinder H20c and also in my boat's LMS 337c. Ask Salty about his opinion on the map.