keep in mind these things are, for the most part, built by hand and issues are going to arise. I have had several things pop up on my boat(not a moomba) so it's across all the brands.

Wolfe is spot on with the upgrades as well. when you buy a new car, the stereos in most of them suck at best. manufacturers put in what will suite the 90% and the rest upgrade, just like a boat. ask on here how many still have factory stereos or factory ballast and it'll be a staggering number that have replaced part/all of them.
fwiw, I had roswell in my supra and some of my friends thought they sounded great. lasted 1 season and replaced. they were crap imo.