Hi - hoping someone can provide some advice. Looking to purchase a Lowrance Elite 7 Chirp. Will be fishing the bay, the Potomac, and some lakes in PA (Raystown, Marburg, and others). Not sure if I should get the model that comes with Navionics+ or get a different map card, like Lake Insight, Nautic Insight Pro, Navionics Hot Maps Premium, or Fishing Hot Spots Pro. If anyone has experience with these various map options, I'm hoping you can direct me to the best one for the money. Thank you all in advance for your help !!! Joe.