You can fit a 280mm radiator into Enermax's Fulmo ST chassis.
Enermax today dropped us a note to let us know it has a new flagship mid-tower enclosure, the Fulmo ST. Built with versatility and cooling in mind, the Fulmo ST has 32mm of clearance to hide your gnarly mess of cables in the back where they're out of sight and, more importantly, unable to impede the case's airflow. And if you're into water cooling, there's enough room on top to accommodate a 240mm or 280mm radiator, Enermax says.
If you're more interested in air cooling, the Fulmo St will oblige with support for up to 10 fans, two of which are included. It also features eight 3.5-inch or 2.5-inch drives plus an additional hidden 2.5-inch drive bay, three 5.25-inch drives, bottom mounted PSU slot with rubber pads and removable dust filter, tool-free ODD installation, and eight expansion slots.
The top I/O panel has four USB 3.0 ports (two are color coded, but all four support the SuperSpeed spec), mic and headphone jacks, and a fan controller.