With your $1,000 purchase at Best Buy, you will earn rewards of a $20 Best Buy gift card. The Pro isn't listed as a SKU in their system right now but will most likely appear in their weekly ad tomorrow.
The Microsoft Store will offer a two year warranty for the Surface with two years of the Office 365 subscription for "under $200" (I'd guess $175-199) which would usually run about $300 total.
For the RT launch, they offered a free Guide to Windows 8 book as well as a free year of Xbox Music plus held a raffle for some accessories, a Xbox with games and a Windows Phone.
One thing to keep in mind, especially if something were to go wrong with your Pro, is that Best Buy is a third party vendor while the Microsoft Store is a first party vendor.