I'm looking for a good marine GPS unit for a SportJon and specifically Alaska's internal waterways, rivers, etc. I don't have a specific need for a fishfinder/sonar, but would not mind the function for later resale. My last boat had an older Garmin unit (4" screen) that had standard 2-d resolution and included a memory card with Alaska specific information. I sold the unit with my boat as a package deal after erasing the memory card preventing the new owner from learning where spent my time.
My personal GPS unit for hunting is the Garmin Oregon 400t. The 3-D, high zoom, color resolution is what I'm looking for when it comes to my boat's gps unit. With new technology, electronics become dated rather quick. I used the search function as a start and found the following thread: http://tinyurl.com/ydsaugl. It was a good start, but didn't include what I was looking for.
Ideally I'd like a 5" screen and color 3D mapping. The folks over at Sportsmans and Sports Authority were less than educated on their units. Luckily Best Buy helped, but to a limited degree as their marine units are online until they bring more stock into Alaska. Bestbuy lead me to the Lowrance HDS-5M chartplotter GPS online so I looked at one (at Sportsman's) but didn't care for their customer service or the lack of high resolution in the 'demo' mode. They also refused to take it outside so I could verify the true resolution and color of the unit so they lost a possible sale.
While it can be argued that this unit is to much for a river boat I like the extra features and ability to see more around me than other units allow. Anyone use the Lowrance units? Do they fit the bill or would I be better off with a Garmin? I'd like to hear your opinions and experiences based on what you own and have used on Alaska's rivers. Thanks.