Gotta go with the Gatorskins. Those things are a solid as you can get.
Yes, they weigh a ton, and you'll definitely notice the reduced grip on cornering, but they're well built. I have been using a Gatorskin on my rear powertap wheel which gets ridden on the trainer on weekdays, and on long outdoor rides on weekends, and even after 6 months of regular riding, there's barely any wear on the tire. Even with all the 'trainer eats your tires' business - it's been completely resistant to trainer wear.
I ran ContiGP4000s before, but stopped using them because my trainer flattened the profile on the within a few months.
I've still had 2 punctures with the Gatorskins outdoors, but those were nasty nails that would have gone through anything.