Hi,
Now, on a traditional basis, I usually recommend Desktop PCs, as they can typically hold more high-quality components for a cheaper price. I built a Desktop PC for about $1200, which contains an i7 CPU @ 4.0GHz (up to 4.4GHz) and a GTX 960, but with a GTX1060 would cost around $1400.
If you are looking for portability (as in something you could bring out or move around the house at any point, since Desktop PCs can be quite heavy), then of course a laptop is the way to go, though than can be on the more expensive side in terms of the gaming PCs.
- - - - - - - - - - - - - - - -
ALSO, just to clarify, is it this model?
https://www.amazon.com/Alienware-17-R4-AW17R4-i7-6700HQ/dp/B01M9H3X7D/ref=sr_1_2?s=pc&ie=UTF8&qid=1485648915&sr=1-2&keywords=Alienware+17
- - - - - - - - - - - - - - - -
Now, for my main point, the Alienware 17 seems like a nice computer, but while I will say that the new i-7 CPUs are nice, your 2.6GHz may struggle to get by. Luckily, the i7 6700HQ CPU boosts up to 3.5GHz, so that should help.
With that said, GPU power, more often than not, tends to be a little more important than CPU power. But I will say that since your CPU goes up to 3.5GHz, the CPU should be able to go along, though of course more CPU power is always desirable. Unfortunately, almost EVERY typically gaming laptop out there uses the same CPU (Intel i7 6700HQ), which is considerably bothersome because it takes aware from the customizability of it... but alas, it is what we must use so there isn't a huge workaround for it. I will say that the GTX 1070 is a beast (in a good way), so that is a huge plus. Since the Alienware 17 is around $1800 now, I found some similarly-performing laptops from different brands at the same or slightly lower price:
-
https://www.amazon.com/Acer-Predator-Gaming-GTX1070-G9-593-77WF/dp/B01LD4MGSK/ref=sr_1_1?ie=UTF8&qid=1485648457&sr=8-1&keywords=acer+predator+15+g9-593
^^Great deal^^
-
https://www.amazon.com/MSI-GT72VR-Dominator-Pro-015-i7-6700HQ/dp/B01IO9Y35G
^^Same specs as the Alienware 17^^
-
https://www.amazon.com/ASUS-G752VS-17-3-Gaming-Laptop/dp/B01L9SK9R0/ref=sr_1_2?s=pc&ie=UTF8&qid=1485649164&sr=1-2-spons&keywords=RoG&psc=1
^^Bundle deal with a video game ("Watch Dogs 2") and a backpack case^^
- - - - - - - - - - - - - - - -
So, yeah. Good luck! Come back with any questions if you have 'em.