Yeah, good luck with the building!
7 fans sounds like an awful lot, and should do you well.
Shame there all 80mm though, because I think at least 1 120mm fan would have been alot better.
Quieter and more efficent
Though that case seems like a good one, so at least the air will circulate well.
I mean you could have all the fans in the world in your case, but if they weren't positioned right, you'd have nothing extra.
(Tries hunting for thread where a whole case was made from fans)
As for watercooling, I don't know enough about it to even try and put it on my machine (and you need a rather deep case) but I know that if you were careful, checking every joint before placing it into the case, you'd have no troubles.
It might be worth checking into later
Give you a chance to mess around with that system even more to make it cooler, and if you decide to overclock, you wouldn't have any problems doing that then!