Nojiyama Marunaka Kurouchi Deba 240mm

Big, big, big. Heavy.

For the home user, having a deba of this size to reach for when you land that big bream on your cutting board means a cleaner breakdown of the fish, with less effort. The size and weight offer control, with little likelihood of deflection as you break down the fish, with plenty of blade length for filleting. 

If you're thinking cost-performance deba this one has to make it on to your short list. It's a very substantial piece of steel at a price that won't break the bank. Nice, sharp steel at that.