What to look for in a filet knife?
I did buy a folding Buck fillet knife. Very well made and reasonable price. Stays sharp. Blade is on the stiff side so its almost perfect for deboning venison. Best part is the handle is rubber , non slip.
I know panfish don't have a ton of belly meat, but if you take your time and have a good sharp 4-6" knife, you can salvage it. I love the crispy chip it makes when you fry it up.
The electric knives will clean a mess of fish in a short amount of time, but you'll recover a lot more meat with a regular fillet knife. They (electrics) do work quite well on larger fish and especially salmon, where you leave the bones in the fillet.