I had a similar chat. Same response.
So it seems Discover is the way to go!
Edit: And you can order from any Store.
I just got off the phone with Discover. The guy I talked to said that price protection is only available if the price is lower in 90 days from the same store as your original purchase
. So some conflicting information here. It would be useful if we got a few more people to call/chat with Discover with the same question so we can get more of a clear consensus on the matter.