I would have bought the Quaife, but I was too embarrassed to admit that I did not know how to pronounce it over the phone.
Easier to order a Dana.
Seriously. Quaife is a no brainer for those who track their cars. The company really stands behind their product, and the reviews from those that own them have only been positive.
If it will hold up to Dan's hammering it around the track with all his HP, it should stand up to just about anything.