Desktop upgrade VS Desktop GPU laptop VS external GPU for Razor Blade

[HosteD]

Hey guys, it's really time to buy a new laptop/computer

Currently I have an desktop without an GPU and a old gaming laptop.

I just need to be able to run VR games.
And there are laptops with full desktop specs so hear me out:

I can buy a:

• GTX 970 with my current i5 4670k PC.
  
• I can for that buy a cheaper laptop later on, around $900

Pros: Cheap AF
Cons: chitty laptop. Will travel more in the future so I need a future proof-laptop.
Will need to upgrade the motherboard and CPU soon too if I buy a top-end graphic card.


Total cost: $1250 Costs ~$1750 for top-end graphic card.

OR

• AMD Radeon 390 or Nvidia GTX 970 external GPU with a Razor Blade + Razor Core

Pros: Can use the external GPU with AMD XConnect AND my current desktop.
Cons: less portability for gaming. Overpriced razor with less powerful CPU.
Could only use a Razer laptop, but I don't know if I could use the Razor Core with other laptops in the future

Total cost: ~$1750, will cost more with desktop i7 laptop


OR

GTX 980 & i7 6700k desktop processor in laptop

Pros: Ultimate gaming portability with performance
Cons: Ultimate price, can't upgrade

Total cost: ~$2900

Portability and performance are the most important, price not really if it's the best investment.

What would be the best?

[HosteD]

Plus the next gen graphic cards are close. So I don't know if I should just wait. If they would come out I can still buy the 970, but probably cheaper...

[LOnE_WoLF]

damn just go all out and buy the expensive one