K2 Auto Evers are better suited to the Turbo Dream. I demoed the 2011 Auto Evers and I loved them. They had a new toestrap system which was awesome. I wanted to try the formulas, but didn't get a chance to. Formulas soft bindings meant for freestyle. The TD is an all-mountain stick that is stiffer flexing.
Normally I'd suggest the Auto Evers or Autos for the Turbo Dream, but he mentioned that he wanted to take it into the park as well. I haven't gotten a chance to try my Uprises yet (and haven't tried the formulas, although I've heard a lot of talk about them), but it sounds like they'd be stiff enough for when he was out of the park but still be playful in the park.
I could be overreacting to the park statement however.
Edit: To the guy above me, Auto Evers are pretty much the stiffest bindings that k2 makes to my knowledge, so they should be great if you want a freeride/big mountain binding.