I have been riding a Cannondale Enforement for about 4 years and it is still holding up well. It is my daily commuter (when the weather is tolerable). I would guess it has much more than a thousand miles on it.

I was looking at upgrading to a newer version of the Enforcement, but it seems they no longer are making them in the USA. I like the fact mines says "Handmade in the USA" in black with an American flag on it. Might upgrade some parts this season though.