I have a pair of the Joe Rocket leather jeans. They are several years old and after lots of use are still in good shape. I was concerned when I bought them because they have plastic zippers, but they have held up very well.
I have a pair of Draggin Jeans ( www.dragginjeans.com ) and a pair Brosh tex jeans. Both have Kevlar in the knees and rear end. I chose these over the Joe Rockets because of the Kevlar. In my opinion the Brosh tex (www.brosh.com ) are the best of the 3 and the best priced. That being said, I don't wear them in the summer they're very hot. Not only are they made of heavy jean material the companies add thick Kevlar inside the jeans. For the summer I will use Fieldsheer's mesh pants. For $30. more you get better protection, cooler material, and hip protection.
'02 Silver ABS