Which one?
The "IFX-14" is $79.95, I could only find it on their website from a quick google search. The "Thermalright CITY", as Spawn called it, is just a collection of all Thermalright compatible coolers for that board and its add-on's (gpu, ram, etc).
I would link you directly to the product page, but they don't have a very nice website in that way. http://www.thermalright.com/product_default.htm <<< Thats the page link for every page in their product section. ><!
oh, um, the "Thermalright CITY" would cost around... a buhgillion dollars. lol Actually, its something around $160 (by my calculations at least). That would be a good setup for a case that had case fans for a side panel. XD