Neville's Haze, or any of the classic Hazes, for that matter. Flying Dutchmen's Original Haze offers a very trippy up high that will have you looking through your phone book for someone to go do something with.Jack Herer is hands down my #1 sativa choice for pain relief that allows you to function. Hit it hard, and it will still fuck you up into next Tuesday. Potent shit that even some of the most experienced user experiences occasional flashes of paranoia, but overall quite a cerebral high with a high ability to function quotient.