I just bought the SilverStone Heligon HE01 CPU Cooler with 140mm fan ( $64.99 after $10.00 rebate @ Newegg ) for my air cooled rig. It was either this or the Noctua NH-D14 but I went with the HE01 because of the ram clearance in it's design.
I'm no pro Bench-marker/Tester like Tom, so I'll leave it up to him to review it's performance. ( Tom, why you no test it??? =D )
It's keeping my i5 3570k at idle temps of 28c - 35c OC'D to 4.0ghz
I'll include some pics. ( Notice those tall Corsair Vengeance ram sticks =D, it has 1/4" of clearance on my GIGABYTE GA-Z77X-UD5H ).
OCT Bench Mark
Couldn't be happier.
System Specs -
Corsair Obsidian 800D Case [ Air Cooled ]
Intel Core i5-3570K Ivy Bridge 3.4GHz [ @4.0Ghz ]
SilverStone Heligon HE01 CPU Cooler with 140mm fan
GIGABYTE GA-Z77X-UD5H LGA 1155 Intel Z77
CORSAIR Vengeance 16GB (4 x 4Gb) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)
Antec TPQ-1200 1200W Continuous Power
GIGABYTE GV-N670OC-2GD GeForce GTX 670 2GB 256-bit GDDR5
Asus VG236H 23" 2ms 1920x1080 Full HD HDMI LCD 120Hz 3D Monitor
RAZER DeathAdder Black Edition
Logitech G15 Keyboard