Thermalright HR-01 "High-Riser
 

An excellent heatsink when used with a 120 mm fan placed directly on its fins; fanless peformance will vary widely based on case conditions.
http://www.overclockers.com/articles1277/

Overclockers.com's tests put the HR-01 on equals terms as Scythe's Ninja when both are cooled by the same 120mm fan.

Scythe Shogun is a wee bit better than their Ninja when actively cooled.. so the HR-01 is no Scythe killer :)