Conti also makes the Ultra Gatorskins in a 27"x1.25" size. They have the kevlar liner to protect against punctures. I have them on my (occasional) commuter/beater, and they seem solid. Pretty happy with the 700x28s on my roadie as well.
They are a bit stiffer than some others, from what I've heard, but are pretty solid and take really high psi.
The best deal I had found was at
www.biketiresdirect.com