Fish Finder

[chumbucket]

I think, for the money, you can't go wrong with the Garmin unit that MJ recommended. I know there are other fine products as well, but I've had overall very good experiences with the Garmin products. I had nothing but problems and disappointment with any Humminbird products so I wouldn't personally recommend them.
Garmin's customer service is also first rate IMO. Very good experiences with them in the past.