Replying to School me in backpacks.

I'm looking for one pack to do it all. I need this for school/skiing/traveling/whatever.

Things it needs:
laptop sleeve
ski carry, vertical or diagonal
vertical snowboard/skateboard straps
room for avy gear, shovel/probe/etc
at least 15L+

A goggle pocket and a water bladder sleeve that goes into a strap would be nice also, but not needed.

Oh yea under $75ish too.

Any suggestions?