Went out for the first ride today on some recently acquired Innova Cobra Skin 2.0 tyres. They weigh around 380grams(somewhat more than advertised!) and pump up to more like a 1.75.
I ran them at 40psi, with a vittoria latex tube, on a mostly road route and holy cr@p! . They absolutely fly! . I thought SpeedKings were good, but these Innova things are really good. Not sure how they will last, though.
Being new they squeak a bit turning on shiny tarmac but grip on gravel, or gravel on tarmac, was top drawer.