oh boy.... get ready for world war 3......
You are going to get tons of opinions on this one.... just remember they are all opinions.... You will mostly hear Exile and Wetsounds probably cause they are the most popular.
I run and like Exile.
www.exileaudio.com
I just have what they call the surf speaker. Better for what you are looking to do. You can still hear them behind the boat when wakeboarding, but if you want true projection you would look at their wake speakers, which are horns....