I went with 30 X 9.50 X 15 on my K10 'Burb. The truck had bigger tires when I got it. 31 X 10.5. They looked OK, but I decided to go with a smaller tire that would work a bit better in snow. Narrower is generally better in snow.
The new tires are Cooper Discoverer ATR on Pacer 107P Soft 5 Polished Aluminum Wheels. Out the door price, for 5 wheels and tires, was $1186.50. That was May of '07. The setup looks good on the truck. Tires are wide, but not too wide, for my taste.
Check out the wheels on the net.
