With the help of the members of the forum, I recently upgraded my radio to the Clarion M109 http://www.clarion.com/us/en/produc...nits/M109/us-en-product-pf_1259392721061.html & would like to now upgrade my speakers. I am pretty ignorant when it comes to electronics, so bear with me. The pontoon has 4 speakers in it. What size (watts) of speakers can I get for quality sound? How do I measure the speakers to know what size to replace them with? What is a good quality brand speaker? Any other helpful information is greatly appreciated.