To sum it up for me, I have two of the TMD fan?s setting in my closet. IMHO, there is no advantage to these fans, none. If I seen any advantage, it would be that the TMD fans look nice. When Y.S. Tech came out with the TMD fan, the 70mm fan was to be their first model. After that they said that they were going to make a 60mm and a 80mm fan too. Ask yourself why we do not see the other size fans.
I replaced the TMD fan, that came with my heatsink, with an 70mm to 80mm fan adapter and a 80mm fan. The adapter moved the fan back away from the heatsink, which reduces the dead air flow zone under the normal fan and the 80mm fan is quieter than the TMD fan. I did not loose any cooling performance and have a quieter computer, no low growl noise from the TMD fan. The 70mm to 80mm fan adapters can be found at SVC but are out of stock right now.