hows this unit? how much money do you have to spend? this one is at dicks. the larger screen size is nice but has its trade off. more battery and weight. going light on a kayak can really pay off ,especially when you are on the water for more than 4- 6 hours. bigger units will have more features of course, but the cost can run you as much as a peddle drive hobie in itself. let me know if you want to buy mine used ? 898 si
