I went with the Helix 7 SI unit. I needed a new one for the boat anyway, so why not. I then purchased a ice transducer, and an extra power cable hooked it up to the power box I made and used it all winter. It worked awesome. I also have the FL28 and I'm very glad my wife likes using it because ill never go back to a straight flasher again. I just install the unit in the boat this weekend and am hoping to get it on the water tonight. The unit was around $750 and another $100 for the ice ducer but can use it all year seems like a great idea to me!!