I just got a really good deal on an hds 9 gen 3 and 3d structurescan that I couldn't pass up. Im not so much worried about the lakes in the area that I fish as far as mapping goes. I'm more worried when I go down to the coast, I would like know more about channels and stuff. Most of the time I'm down with buddies that have grown up there and know their way around. I'm getting to where I want to go by myself and think a map card would be somewhat helpful.