OK, I pulled the trigger and bought myself a kayak, and plan on fishing a couple of local waters as well as slightly larger waters with-in an hour or so distance. While I have an older Fishfinder 250 I think it is, I was wanting to upgrade to something a bit more modern with side imaging. I am looking for suggestions. It will be ran off a small 12v/12AH battery in water from just off shore to less than 50' primarily. I am not really savvy on these so any and all help would be helpful. Thank you ahead of time. Oh yea, needs to be in the less than $500.00 range.