I bought a Hummingbird Model 597 CI HD, does everything, and more, that the unit should do.

The only thing I'd do difference is get a larger screen but that wasn't an option when I purchased mine in 2011.

IMO...person needs to go to a place, like Cabalas, where many models are on display, then get a knowledgeable sales person....and have him point out the + and - of different units.......it will be "mind overload" if you don't have some kind of background before you get there.

Technology is changing SO FAST, that it is tough to stay current on features that different companies provide. Cost can be shocking, more features, bigger screen....can get over $2000+ pretty quick.

Good luck!!!!!!
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"Worse day sport fishing, still better than the best day working"

"I thought growing older, would take longer"