2016 Laptops. What do you use?

Hi , my friends,
I want to buy a laptop to use for Harmony Premium 14 /Stand Alone and follow the system requirements.
I 've been searching online and haven’t had much luck.
I realize that I have to be more relaxed on a few of the requirements and on some of my requirements.
It’s been very difficult.
But, if I could have my dream laptop, I’d like a 14" or 15" screen to draw on, very powerful,
weight doesn’t matter, up to $2500 and
a Windows 10, CPU I7, RAM 16 GB upgradeable to 64 GB, a GTX 970 or GTX 780 CPU.
One part or another has been missing from all the available laptops, 2 in 1’s, tablets.
So, what do you guys use that you’re really happy with?
Thank you so much for your help and insight, in advance.

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