Ian,
i had a similiar issue with my rears - Dodge redesigned the adaptor the pads sit in, so if you keep the stock brakes and use the new adaptor you might get better mileage from the rears.
I had dodge comp me the brake job after i found the dealer swapped out the adapter when i had them do the brake job. I investigated further and they admitted the new design reduced binding. What's interesting though is the new design comes with new anti-rattle clips which aftermarket brakes DO NOT come with. The pads are also a slightly different design. When i redid the brakes this year i had to switch back to the old design pads (no one in the aftermarket world has this new design) and get new "old design" clips. Not sure if that will result in premature wear again but i find the new pads fit very snug and didnt move very freely. I greased them heavily but i think maybe grinding some of the contact points would improve the action and improve life.