A Word of Warning on radiators in the Carbide 300R: An amazing case as it is, The Article mentions that Radiators, and specifically the H100 will work in this case. This case is NOT designed for top-mounted dual-fan radiator use like the one in the H100). I personally took on the challenge of trying to shoe-horn an H100 into this case, and I was able to do so with Scythe ultra-slim 12MM Fans, But many motherboards would NOT fit, even in this situation. These fans stick down far enough that they are even with the first row of screw-holes in an ATX motherboard. If your motherboard has big heatsinks or connectors along the top edge, they will block you from installing a radiator in this case.
The case over-all is magnificent, I have no complaints with it, other than that they have not put up for sale the accessory kit containing a bracket to install an additional 4 drives (Note above the bottom HDD cage, there are more rail slots, and mounting holes on the opposite side to hold the opposite rail slots.)