First off I just started fishing out of Fort Morgan last year, I rarely go more than 30 miles so 150' is about as deep as I get. With that said I am looking for a good fish finder, sonar, sounder, whatever you call it. I know very little about what is better vs. what is just a gimic, so far I have just relied upon my GPS numbers. I do not really need it to have GPS capability, and would like to stay under 700 bucks, but if a far more superior unit cost more I am not against spending more as long as it is worth it.