Hey guys. I got my first boat last night and it came with a Hummingbird 597 ci HD with down imaging. I was told there are chips to load into them for the lake layouts. I did a search on them and see that there are tons to choose from. Can anyone recommend me a good chip to buy for it new or used. I will be fishing primarily in Missouri and Kansas; Truman, LOZ, Clinton, Hillsdale, Stockton, etc. May take an occasional trip north to Minnesotta where I have family and grew up fishing for walleye, but if a seperate chip is needed for up north thats fine, I'll buy it later. Thanks for any and all help, it's appreciated.

-Ryan