It will support it, and the cooling is pretty good but you wont get your watercooling in there Hayles as its pretty much just got room for the basic hardware and F/A else!
Siravice is right. get the 840 if you just want to bolt it in. Or if you want to spend some money on mods get a Lian Li.
Look at the a70 and a77 both have new varients about, if you like the look of the Lian Li's then I should be able to help you out getting them water ready
I have looked at both of them cases before..... the things I don't like about them, is silly I know, is the grill at the front with that fans behind.... would I or you TTL be able to change that somehow???
You can change the front grill if you have too but tbh thats where the second rad is meant to go. Take a look at HellFire & White Star. Both have top rads so it will give you an idea, the A77 is pefect for big dual loops. The A70 is better if you have to have an optical drive.
If you want to get creative then Id say the Lian Li's are better than the 840.