Which Navionics, Lakemaster, or other brand chip, have you guys found to be the best one to get and use? Most accurate, most detail, etc? I'm using a Lowrance Gen 2 touchscreen unit, (probably doesn't matter)?
This can be easily solved by checking out the mapping available from each, like said above, the Lakemaster card only works in HB units, but to see the mapping available from Navionics on the lakes you fish check out the free webapp.
Be sure to zoom in and also hit the button on the left hand corner and be sure to check out the Sonar Chart layer for the areas you fish as well. It is the layer that stores all of the user recordings that are submitted to help better the mapping in numerous areas around the country.