Good morning Antonio,
Yes, the FCV628 is a wonderful unit for certain types of fishing. We must find more out about how you plan to use the unit in order to determine what is the right combination of display and transducer.
1.) What depth do you plan to target while fishing with the FCV628?
2.) What kind of vessel will it be on? Trawler, Sport-fish, day-boat? What size and speed is the vessel? Will it be on a trailer often?
3.) What is the deepest depth you want to use the FCV628 in?
Answers to these questions will help us determine what is the right choice for you.