I am dealing with an issue with the new BFG AT's I just bought and the guy that runs the Road Force balance shop where I took them said to only buy Michelin or Bridgestone. He is an adviser to Hunter and they fly him out to St Louis to test out their equipment before they release it to the public. Just one opinion, but a pretty good one that follows mine and Gadget's experiences.
http://www.gadgetonline.com/vibration.htm