For what its worth, we were going to go with 2 sets of SXT65Q (spin version) with the harpoon amp. We ended up going with 1 set of the SXT65Q and 1 set of the X7's with the Harpoon amp (with the wetsounds 420EQ, keeping the stock deck, cabin speakers & amp as is). I am glad we did... The combination of the two provides more range of sound from lows to high. My friend has the same set up, but ended up going with 2 sets of X7's. While his is louder from a far (and bleeds the ears up close), it does not "sound" nearly as good. IMO, the hybrid system is way better... Hearing the music out wake boarding is not an issue and when your surfing, you actually have to turn it down... We also went with a 12' Exile Sub & 800 amp to push it... Sub is a must! The system really pounds & we could not be happier. Just don't ask about our install!!