Quick note on the F210. I had some issues with the transducers "fan" getting stuck.
The phone support sucked, but I e-mailed the company and a rep sent me an completely new unit free of charge without my asking for it. I never complained about the phone support, so this was not a response to an angry customer. I had simply e-mailed them looking for guidance with the problem I was having and a reply informing me of the shipment was sent a couple of days later.
The unit saw 3-4 months of use befor it gave me problems, but that might be a tank or fuel issue.
My point is, damn nice support from the company. I am going to wait until the spring to re-install the ducer when I prep the boat for the season, but I would buy from the company again and again because of their response.
GW