Anybody have a Humminbird® Fishfinder 570 DI Sonar Fishfinder? I am looking at using it in average 30ft of water or shallower looking for any small chunks of bottom structure. I have never had any kind of electronics on my boat before so I really have no idea what I am looking at. If you have any better options my budget is $400 or less.

I would rather get a 596C than a 570DI. While the down image technology is cool, a quality color unit will serve you better in the long run.

well for my uses I didn't think the extra money for a color screen was worth it I have read grey sonars before with no problem so I thought I would save a little money.

I purchased one and it's installed. I'll let you know how it performs after this weekend. Color is preference, so if you don't mind grayscale, then go for it. $299 is a killer price for Down Imaging in my opinion.