Of these 2 heatsinks, TX-3 performs better. The main reason is that it has three heatpipes (vs two of the 101) and, its stock fan is 92mm (vs 80mm of the 101).
This better performance is, of course, reflected in its higher price.
So, get the TX-3 if these are the only 2 heatsinks under consideration.
Review link: (Frosty gave it a 5-check rating)http://www.frostytech.com/articlevie...id=2401&page=2