keep in mind that you can get to invoice before the cash rebates. We just got our 2012 sticker was about 27,500 and we got it for about 22,500 with 2.9% over 72 months and 300 over what we owed on our one year old trade. Invoice on ours was about 24,500. xplan was about 25000 and a/d plan was about 24000. I feel we got a great deal.
All this being said, if the dealer knows you're driving 3 hours to get to them they already know they have the upper hand.