I would be willing to pay $300. In $400, I could build a computer that would crush the Xbox 720.
I'm not paying more than $450. Even that seems high. And with the huge back catalog the XBox 360 has now, it's going to have to be a tempting price and specs to lure me away from my 360. It's not just the price that makes it a must buy either. It's got to have some killer titles when it first comes out. That's almost what finished the PS3, when it was released, no decent games.