Check out user survey results for all season road tires at Tire rack:
http://www.tirerack.com/tires/surveyres ... p?type=HAS
this has the silent armors listed as moderately weak on treadlife. If the ST's your talking about are Wrangler ST, then they are rated very poor all around by the survey. If they are the stock tires, I would advise buying ANYTHING else. His jeep will thank him. They are quite horrible.
I've heard nothing but good about Goodyear Fortera TripleTreds, Michelin Latitude Tour, and Bridgestone Dueler H/L Alenza. I've heard bad things about the rest of the Dueler line, but supposedly the Alenza model is good and I think I remember people in a lexus SUV forum talking about how well they liked them.
I am currently using Cooper Discoverer CTS and they are really good in the rain, better than anything I've driven on snow, and even pretty decent on ice. They are comfortable and quiet and handle decent too. I think they ran about $130 each but I don't remember for sure. They are either a 60k or 70k mile tire.
EDIT: Heck if you want mine for about 1/2 of the new price, they've got 10k miles on them. I just got a lift and I'm going bigger. $300 for 5 tires that were bought at the end of january and have been rotated every 3000 miles. Plus actual shipping.
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2005 KJ Renegade
Fabrications for sale:
Aluminum Roof Rack (See Page 9)Aluminum Gas Tank Skid --
Radiator Skid --
Front Strut ShimsComing Soon: Rear Bumpers with lots of options