[basssj]

If you go with the lowrance, I would get a 520c head unit only from three rivers marine electronics for $349.00 and add a transducer for your application for another $50-70. The 520c is gps capable where as the 510c is not, plus the 520c ends up being a few $ cheaper bought as I suggest. If you want to add the gps later all you need is a lowrance gps puck for about 165.00. I think the Lowrance has better picture quality than the Eagle models. Everyone that I have talked to swears by the hummingbird 797 side imaging. I would like to see one in action before forking over the 1,000 for one though. Rumour has it that Lowrance may be coming out with side imaging of their own in the next year or so.