We just bought our first boat which is an 02 Islandia. I will start off by saying I am not a mechanic!! I can build you a house and fix anything except when it comes to electrical and engine wise. The stereo does not work for whatever reason and the previous owner never messed with it. We want to, can't not have music..... right. Is there anything I need to know about what will and wont work and fit in the compartment? Also, should I look into some speaker upgrades or are the stock ones ok? Thanks for any and all help!