AnandTech published a good review of the new Ninja Plus Revision B HSF from Scythe:
There is no getting around the fact that the Scythe Ninja Plus B is a big cooler. Most of the heatpipe towers are huge, which is part of why they are effective. The good news is the fin array is raised enough that it clears the power transistor passive coolers, heatpipes, caps, and fans on every board we had in the lab. This even includes fitting on the ASUS Striker and Commando boards, which can be a challenge with their raised heatpipes and passive cooling sinks surrounding the CPU socket. There's not any room left on these ASUS boards to fit hands between the heatpipe ring of the board and the fin array of the Ninja Plus B, but you can mount and unmount the Ninja Plus B if you are careful and first remove the motherboard from the case.