I have these,they have been on the site for a wee while,if you are interested send me a message ,
Fast rolling on the road and tough enough for gravel tracks.
I bought some Schwalbe Fat Franks for my Surly Troll and really like them. I've heard great things about Surly Extra Terrestrials if your bike can take 2.5" tires. Schwalbe also makes the Apple and the Marathon in 26 inch sizes. Serfas makes the Drifter and Kenda has some inexpensive / heavy balloon tires that roll pretty well. I swapped my Fat Franks for the latter and the Franks are waaaaaay better.