Yes, they're roughly the same width - that's how I have them here
Granted it's not going to be something the hardcore water-cooled crowd go for but I plumped for that Zalman combination for convenience and build quality (and it's so much quieter than my previous fan based configuration). It's an absolute doddle to set up and maintain - topping up the reservior once in a while. I've used many Lian Li and Coolermaster cases in the past but I wouldn't go back to them now - the finish on this trumps them all.
Best of luck with whatever you choose to go with