The CNPS11X Performa performs similar like Scythe Mugen 3. It goes like 154x135x80, 450g, 39$ vs. 158x130x108, 825g, 45$. Zalman lacks the intimidating effect on other components though.
I won't be buying this cooler, I own several of their much older coolers from a time where coolers that were solid copper used to be almost common place. Even modded a old cnps7000a and a 775 mounting kit to work on a 1155/1156 board with ease.