Garmin may be the right choice for you. They are among the best as producers of fish finder and GPS systems. Other reasons for choosing Garmin are for their selection and with a large selection comes the ability to find a fish finder or GPS system that will fit your budget. Garmin has been around for a great many years and if they didn't build dependable fishing an GPS systems, its a guarantee that they wouldn't be.

Garmin
440SX

Garmin
525GPS

Garmin
535GPS

Garmin
StreetPilot C550

Garmin
GPSMap 398

Garmin
Quest Navigator