What s the best laptop for designers?

I believe for selecting Laptop for designing Purpose should consider

  1. High speed Graphic Card Compatibiity
  2. High RAM atleast 6 GB to 8GB
  3. High Speed CPU 7th generation these days
  4. Last but most important Bugdet

WE use Apple MacBook Air MMGG2HN/A13" Laptop(Core i5/8GB/256GB/OS X El Capitan/Graphics for PCB designing

Other choices can be

Dell Inspiron 15 N5559 HD Touch Core i7-6th gen 8GB 1 TB Window 10 4Gb Graphics
Asus ZenBook UX305UA-FC013T Laptop (6th Gen Intel Ci5/ 8GB/ 256GB SSD/ Win10)