Well i hate to be a negative nacy but the samsung series 7 gamer has the same if not sinilar specs as the mx17 for 1500. I believe they are going to have a hardtime selling these. Good luck dell competition ftw!!
Have you tried any of the sony S series laptops, they are pretty thin and depending on the model you can get pretty decent graphics power. Paying ~$1000 for intel's integrated graphics feels like a total rip off to me.
I would try to stay away from these, because on the current passports WD has sodered on the micro USB 3 to the drives, so even if you manage to take the drive out of the shell, you won't be able to use it as a SATA drive.
Couldn't agree with you more there aren't any games right now that take full advantage of the new GPU's, so it would be silly to spend another ~$300 on a GPU just so two games can take advantage of it.