I stopped at the Cabelas store in Hamburg Pa on the way back home from the holidays. They had a Lowrance hds10 with the side search right next to the hummingbird side view 10". I had the salesman give a demo on both, needless to say a group of other fisherman gathered and a million questions were shot at him on both units. The Lowarnce package was approx. $300 more but for my money IMHO the Lowrance smokes the hummingbird in clarity, graphics. ease of use, and definition. One thing that I thought was another plus was you can or have purchased a HDS recently you can add the side search to it for $595 in loo of buying a complete new system at one shot. The more I watched the demo and heard the barage of questions on both units, I couldn't help but to inquire on the more features of the Lowrance. It's loaded with lowrances version of navionics but also navionics compatable (didn't quite understand that). It was well worth the almost hr viewing the 2 side by side and getting a better understanding.