I found an article about tire stuff. It's a tad old, so the prices he has listed are probably off by about $300 or more, but the info is still good.
http://www.machinerylubrication.com/Read/510/buy-tires
And here's the UTQGS site at safecar.gov.
http://www.safercar.gov/Vehicle+Shop...s/Tires+Rating
Feel free to impart what you know on the subject.