I've been considering purchasing some Schwalbe ThunderBurt 27.5 x 2.1 tires for my frame, but have been a bit hesitant, being not sure if they would fit (2.0 file-tread tires fit fine).
So I had a look around again and came across these 2.0 tires (China). Cheaper through the China-direct sites than Ebay, so I'm going to give them a go.
Their tread pattern is what interested me for gravel riding; low side knobs (frame clearance) with what looks like a nice rolling centre pattern. They are also very light at around 380gm, compared to the 415gm ThunderBurt Liteskins.
Those look really interesting. I'm currently running Panaracer Comet 2.0s and I'm not sure of how they will wear over time. I'm interested to see if they are true to size (although they say 54-584 on the sidewall).