Not sure if i am breaking any rules here, obviously it is an electronics question, however I am looking to speak to people specifically in Maine or NH to see what chip they are running for their sonar.

I run the Navionics chip. It is a god send, I dont say that lightly. Even for 5 years of tournament fishing im still fishing new to me lakes every year. And it really does help eliminate water very quickly. There are still some lakes that don't have the detailed contours or any at all. I would highly recommend getting a card.