The Blade Stealth is the fastest laptop we've tested with GeForce MX150 graphics and now it costs about the same as most other Ultrabooks with no dedicated graphics at all. If you're in the market for an Ultrabook with more graphical oomph, then it may be worth considering the Razer.
https://www.notebookcheck.net/Razer-Blade-Stealth-with-GeForce-MX150-and-16-GB-of-RAM-is-now-500-off-and-finally-at-a-decent-price.433454.0.html