I voted Sene - raw talent. The video of the other 2 bigs (Armstrong and Johnson) didn't impress me that much.
Like EMC says - get a big that's worth a pick and if none are left, go with a quick PG if Price isn't ready to be the backup and Hart can't do it in Muss' system, whatever that ends up being.
If nothing else, get a good PF. As long as Bonzi comes back, we've got the 2/3 spot covered. Go for whatever else best moves you forward as a team.