replacing fishfinder.

[rolmops]

I have always been a Furuno lover, but things change. Right now I fish with a Furuno 628 with a b60 transducer. It is ok ,but not great although it is very user friendly. Now I am considering to change to a 588 with an Airmar ss164 transducer. I thought about the 258 and the 260 but those are huge for a 19 footer and although better by far then the ss164 they would literally slow down my boat. the replacement cost would be about $2400 if I stick with furuno. Now what else can I get for that sort of money that would be better than the Furuno? Please advise me.