Fishfinder advice needed

Hi all,I’ve bought honwave t40 inflatable boat,looking for fishfinder,any advice please.
P.s budget 200-500 e.

Go for a garmin top class products

Thanks donal.

A Garmin striker 5dv, bought one last year and find it excellent.

At that price the small Raymarine Dragonfly will be hard to beat. HD Digital, plus CHIRP Technology. Try the the 5 inch unit. Makes a difference when looking at split screen. I got mine form the US for about €350 delivered. It's been a while since I looked at Garmin units. Normally they are very good and have the advantage of better integration with the chart plotter and map source software.