A 60 minute addition is for bittering only. You will not get very much flavor and even less aroma if you go all 60 min. My guess is that beer uses a small 60 minute addition, a moderate amount of hops around the 20 minute and then additions at 10 and flame out. Cascade would be a good choice, or Centennial or a blend of both. I personally think they use hop extracts, but you should still be able to come up with a decent close.