"NZXT H2" is a silent Mid-Sized Tower case, the feature descriptions doesnt say anything about water cooling, instead many of the Full Tower cases explicitly say "supports 2 radiators of any water cooling system". http://www.nzxt.com/product/detail/103-h2-case.html
If you want more info, this water cooling i want to buy: "CORSAIR Hydro Series H60i".
Based off of your link you provided, the case DOES support watercooling
^ notice the two black grommets located near where the I/O shield would go? They help in routing your tuings...provided you're going for a custom watercooled setup.
If we're to answer your query about the H60i?
Its only a single 120mm rad that is near similar to the H50 except that it comes with rubber tubes and its also known as the 2013 edition by some people/reviewers. It needs a 120mm fan mount position to install an Closed Loop Cooler like that. So in essence, I can see three places to install the H60i.
FYI - you could get a lil more cooling potential out of a Hyper 212 or the Noctua NH D14 and yet trump the H100i, both, for price and the performance.
The problem with some better water coolings is that require 2 rear fans instead of only 1 and NZXT H2 supports only 1 rear fan, maybe i can use optionally only 1 fan instead of 2, dont know.