So I was pricing out new Exile Speakers for my boat and as I was adding the SX65-M to my cart, I noticed it would only allow me to add 2 sets of speakers. I need 3 sets and it came back saying the quantity is not available. Has anyone had this problem or know if and when there will be more in stock? I don't really want to order until I can install all the speakers at once. Thanks for the input.