Replying to Powder ski options

I have an option/opening to get any one of these skis, for a relatively reasonable price. i'm 5'10", around 145-160 pounds with all my gear on, (boots, helmet, backpack, bindings, etc): the scott p4 (07) in171, the armada arv (07) in 165 or 175, or k2 hippy stinx in 169 or 179 ( it's pretty much a telly version of the seth, but i'd be mounting either AT or regular downhill bindings on it.)  I'm looking to use them as primarily powder/all mountain skis, not too much park, i've got a few pairs of beaters for that. ( I would be mounting them a little closer to center than normal though for BC kickers.)     not exact center, but definately closer than recommended binding point. ideas?