In my experience, gatorskins aren't that hard to mount. Not the easiest tire, but not that bad. Conti contacts are pretty easy to mount, but they didn't last very long.

I was working on a bike yesterday with CST compressor tires (never heard of them before). They were the most rediculous tires I had ever had the misfortune of experiencing. It took two people and a lot of grunting, cursing and wasted time to get them off the rim. At one point we almost gave up and cut the bead off with some cable cutters.