The Dune case is 260 mm x 215 mm x 215 mm. Its designer is raising $130,000 on Kickstarter to get it to the shelves, and has already raised half the amount, with 8 days of fundraising to go. You can back the project from here. The aluminium-built case comes in rose gold and black.
The cylindrical design is a lot different from the Apple Pro, which has its key components arranged along three sides of a triangular structure, with cooling machinery in its black heart. The Dune Case is divided into three compartments vertically along the bore of the cylinder.
The centre has a mini-ITX motherboard with room for a full-height yet under 185 mm graphics card which is connected to the motherboard through a PCIe riser. The third compartment holds two 2.5-inch drives. A custom rear panel plugs into your motherboard. The main air channel is a 140 mm spinner that spouts warm air from the top. You need to find an SFX power supply and you are good to go
The Kickstarter includes an option for a version for $289 with a power supply and $189 without.