Microsoft today added a new Surface Book SKU on its Microsoft Store website. You can now have discrete GPU Surface Book starting $1699. This new model comes with Intel Core i5 CPU, 8GB RAM and 128GB SSD. Earlier, if you want a Surface book with dGPU, you need to spend $1899, but you will get double the storage of the new model. Anyway, choice is good for consumers.
You can pre-order Surface Book from the below link,