Minn Kota, Guest, Pro Mariner, and Dual Pro are all worth a look. I started with a Guest 2611 (2bank, 5amp per bank) that came with the boat and upgraded to a Pro Mariner 3 bank. Both did the job, but the three bank is nice because I don't have to put a trickle charge on the cranking battery during the winter. I know some hard core guys that swear buy their Dual Pro charger also. Check the number of banks and amps you need and then start narrowing things down.