Wyeast 1028 (or WLP013) is closest to their house yeast. I know from experience if you follow the recipe and mash at 151*F you will hit your FG exactly with it. US-05 or Nottingham are acceptible for dry yeast.
I listened to the CYBI podcast with Adam Avery, and he said they use 1056 Chico yeast and mash at 148F. The grain bill is something like 85% 2-row, 9% DME, 3% Crystal 120L, and 3% Victory malt. The only hops they use are Columbus (bittering), Centennial, and Simcoe (no Bullion like someone was insisting). OG = 1.085, FG = 1.011. As previously suggested, a massive amount of dry hops too.