His case is big enough he'll just have to lose his side fan.
Losing a side fan is an easy sacrifice for improved cpu cooling.
Just find a 212+ and lose the side fan.
212+ improved temps by at least 10C
side fan 2-3C.
Sorry i didn't notice the cabinet mentioned. I checked the specification mentioned for the NZXT Tempest and it is only 2mm short of my CM690. So i would say it should fit easily. I have the True Black 120 Rev. C and it fits easily with one 120mm side fan. No problems!