Another vote for Garmin
I just bought a Garmin 72 to replace a 10 year old Magellan handheld that came with the boat. The Garmin 72 is the "entry level" unit, meaning it is the cheapest and has the fewest features. For me, it has far more features than will ever use, and it was easy to learn to operate. Think about what you will be using the unit for before you choose. Me, I actually "use" my gps only as a knotmeter, and to make sure I have a way to navigate around the significant number of rocks and islets in case of fog. All other functions are really gravy; I have used it to map waypoints for a cruise, but since I only daysail within site of land, this was more of a bonus than a necessary function. The Garmin 72 is not capable of showing charts, however, it did come pre-loaded with the positions of all navaids in my area. This is more than good enough for me. If this is enough for you, then you don't have to spend the bucks on a mapping unit. New, the 72 lists for $149, although a search on the internet shows you can buy it for less than that. I bought mine used on ebay; it came with a RAM mount, case and 12 volt adapter (about $40 worth of accessories). With shipping: $88.