These...
Specialized Crossroads Armadillo
I was running Conti Town & Country tires for the longest time but they have gotten crappier so I asked my LBS for a recommendation. They hooked me up with the Crossroads for $65/pair and these things will ride over anything. There is a lot of glass and shrapnel on my commute and the Armadillo casing combined with the beefy tread handles it all. And they are a fast, fast tire; especially for something with that much tread.