If you want your next wallet to be your last wallet, you might consider one of the heavy-duty models from Saddleback Leather. Unfortunately, what I really wanted in a wallet was a coin pocket, which they don't offer (and refused to do custom).

My previous solution to this was a wallet I bought when I was in Tokyo in 2000 that lasted up until earlier this year. (Theory: if you want a wallet with a good coin pocket, go to a country where they've got coins worth as much as $5.) About a year ago, I started looking for a replacement and never found something really done right. Instead, I ended up poking around Etsy.com, where I found a vendor willing to make me a custom wallet to my specs (who has since disappeared from Etsy, so I don't know what happened there). I'm pretty happy with the result, and I expect it will last for many years to come.