Well, nvm then.
I have an Antec Twelve Hundred, it's 0.3 inches wider than the ABS case. The Tuniq Tower that's in there is rather close to the side panel, and actually slightly conflicts with the side 120mm fan I've got installed. Which is a 25mm thick fan. For large fans such as the 25cm fans, they are more like 38mm thick so I guess you'd just have to be careful with any large tower heatsinks.
Xclio with their Windtunnel cases have the right idea. Anyway, good luck with your future build. For the case you're planning to get, make sure replacement fans are readilly available.