My local Bob Jane's always uses a torque wrench for wheel nuts.
If you want to replace the set, I can recommend American Gorilla Lug Nuts. I've used their "lifetime Lug Nuts" and they are a very nicely made piece of gear, the chrome does not crack or peel. They are also one piece nuts, unlike the factory style nuts.
http://www.gorilla-auto.com/lifetime-lug-nuts
Choose the 1/2" thread Acorn style....either long or short length to suit.