I'm in the process of building now.
I picked the Armour for my case, my buddy just built with the Tsunami.
I don't know much about water cooling, but from what I can tell the Armour will be roomier for it. It's got to be a tighter squeeze in the RaidMax.
I'm going with a Raptor, and may later and another and raid control them. If your a gamer they're worth it. My freinds new build (see link in signature below) has one, and the load times is where you see it. If that's not a concern of yours then they're rather pricey for dollar to gig ratio.
Other then that..........Good Luck.