I just picked up the XPS15 before a trip to oz and I'm having to process from it. Mine has the GTX960M in it.
I've got it set up driving one of the new Benqs 2700pts and an old dell 1080p screen. The intel HD graphics controls external monitors.
I currently have a support ticket out with Phase as I'm having regular freezes and crashes on V10.
I have a feeling it's a GPU problem as when I close the dell monitor it seems okay (not fixed, but a little better)
Everything else about the laptop is great. Also, the XPS 13 is a great shoot machine and we did a dawn to dusk project in the middle of the year with one one charge! It was running C9 great. Having troubles with C10 on this at the mo as well.
I bought it with a small SSD and ram and upgraded myself which saved over $1000. Something I love about windows machines.
Happy to try out any specific Q's the next day or so, as I'm plugged in to it doing post work.
I'm shopping for a new laptop and have it down to 2 windows models, the brand new Dell XPS 15 and the Razer Blade Pro. The main difference between these two is a GTX1050 versus a GTX1080. The price difference is 1500. I'm not sure if the extra GP horsepower is really worth it.
Have you guys found OpenCL to be much of a benefit to C1Pro? This is just for image display, but I do want to have the most responsive workflow possible in the field. I process on my desktop.