Pole should only have the 3 realistic options: 449$ , 499$, 549$.
Not really.... I believe that at the time the scorpio is released the PS4pro would be priced at $350 or even $299 depending on how agressive sony wants to get.
Nothing stops MS from selling a $400-$420 console for $350 if they want to price match sony even if its just a holiday or launch special.
MS can go a totally different route and make the Xbox1 Elite or Surafce Box. Whic lands it firmly in premium pricing territory. Bundle the console with an XB1 elite controller and some sort of premium headset and price the whole thng for $599. With an advertised basic "Surface box priced at $450-$499 to be released later.
They did the same thing with the XB1s with the 2TB model (o was it 1TB model) being a limited run type thing.