With its unusual horizontal design, in which the heatpipes move warmth through a right angle, the Orochi is a looker you'd want to show off in a windowed case.
You will need to make sure you've got clearance above the CPU, though. This isn't going to fit all cases, especially if the PSU is mounted at the top.
When cooled with just case fans, the Orichi failed to keep our machine going in a couple of tests, although it fared better when we traded down to a dual core processor.
What this essentially means is that you'll certainly want to use the optional case fan - at which point the benefit of passive cooling (i.e. no noise) is lost.
With a blower attached it's a good sink - but it doesn't compare to most of the competition.
Full resource draw stress test: Prime 95: 65°C
Max load multi-core stress test: HL2 map draw: 59°C
Real-world gaming stress test: World in Conflict: 55°C
Idle recovery (1 min after stress test): Resting: 46°C