Suggestions on Wet Sounds speaker choice?
 

I just bought a '12 Wakesetter VLX. It only has the standard 6 Rockford speakers, small 2 channel amp and dual batteries. I would like to either put to Rev10's on the tower with a SYN4 running it, OR should I replace the boat speakers with XS-650's with a SYN4. I know that these two installs would be somewhat close in cost and I would like to know which is going to be the best step to take. I'm afraid the Rockfords may not be able to keep up with the Rev10's, but I really don't know. Help please?!