I have a leather wallet from BigSkinny and it's pretty good as far as wallets go. I've never worn out a wallet but it shows no real signs of wear that I can see. I've had it for over 2 years now. It's nice and thin.
Which Saddleback do you have? If it's the medium bifold, do you have problems with it breaking cards?
Have looked at that wallet for a while. How bulky is it compared to other wallets?