Brown is the safe pick
Lupul has upside
Chistov is far and away the most talented yet has regressed for a while and is without a doubt the riskiest by a load.
Brown will be an all-star to me. He is a traffic player and the first post described him well, except i feel his talent level is higher than that person. His shot is incredible, his hands are better than they get credit for and he is still developing. Right now he doesn't seem to flashy, but he'll make it to the NHL. He'll never light a highlight reel on fire, but he'll produce and be a 30 goal guy. 2nd liner at the bare minimum.
Lupul has been compared to bossy, and while this may seem kinda crazy, if you see him play at his best its not all that insane. He is a wicked finisher and the 40 plus goal analysis is a good one. He needs to work on consistency among other things, but its nothing that other young players don't have issues with.
Chistov...now this is what you call a project. He was definently rushed. He has 70 point all-star highlight reel, franchise winger potential, but its doubtful he'll reach that now. He needs to work on a consistent effort, taking the body, poise, picking his spots, and just everything general. I think going back to russia or europe lighting them on fire and gaining some confidence would do him some great good...