i fished near some guy using a hummingbird helix 7 last year and was really impressed. we often fish on lake superior in the u.p. of michigan so we are often in deep water (100′ – 250′), the screens are super crisp and the choices of screens were great. after seeing the new helix 9 with SI, and gps i think this is what i will go with along with the navionics map card.
I would bet the lakemaster chip is better than navionics. Its better in MN inland waters anyway.