Humminbird Mega tech is doing rather well. holds its own very very very well in the shallows
the 7410xsv is a up scale starting point. plenty of groovy transducers that could be paired with it to obtain some rather special results. but cost will be way up there
echomap chirp range would be a good compromise.
if you can wait.. id be checking out the Humminbird Mega, and Raymarine Axiom for shallow water work.
Moose