I'm new to this sport so I apologize for blowing this forum up with a questions. I've been researching fish finders for a few days now, I'm looking for the best bang for the buck. Originally I was looking at the piranha series by humminbird, but now I think I need one with GPS. So what's the best combo? I don't really want to spend over 200.00, however I will entertain the idea. Also, is GPS necessary? I plan on doing a little offshore fishing, and a lot of inshore and bay fishing. Thanks for any help and input!!