Don't bother responding to FJF. Pretty much every thread i've seen him post in, he says dumb **** that pisses everybody off. Nothing personal FJF, you just don't get along with others because you consistently act like an angry, bitter *******.
Those 720PRS are supposed to sound pretty nice from what i've been hearing, but haven't heard them personally. The woofers look pretty beefy; how much power are you going to be giving them?
Re: some genre's of music sounding better on a particular set...if all you listen to is irish folk music, you don't really need a set of speakers that play with authority down to 60hz to reproduce the fiddles and ****. However, if you prefer listening to club music that has massive amounts of sound between 50 and 200hz, then suddenly the same set of speakers that sounded great with your irish folk music sounds like complete ass while trying to reproduce all that midbass clearly. So don't discount subjective reviews totally.
For example; i heard a set of eclipse components that sounded excellent playing music that didn't need to reproduce large amounts of low frequency content - they had a 4 inch midrange and a tweeter. Obviously not going to play well in the midbass range - however, that setup did sound EXCELLENT for what it was designed to do. If you tried to listen to some good techno, it was lacking alot; it needed a dedicated midbass driver because of the small size of the midrange. That doesn't mean the midrange sounds bad or good in all situations - but it does mean that it will in SOME situations, which might be prevalent in a particular kind of music. That's where people get their 'what genre do you listen to?' questions.
Personally, i'd rather see impedance and response graphs of the speakers as tested in a car, but you can still glean some information from subjective reviews. Just remember that there are a lot of variables involved...