Another thought about the combo packs is that quite a few young families have mini vans with built in TVs and DVD players. A lot of the Disney titles allow the parents to use the DVD in the vehicle and the Blu Ray on their home system.
I too have shared the DVD with my kids and kept the Ray, but the price has to be sensible.
Heading to Wal Mart tomorrow for Barbarian.
We deal in lead, friend.