GPU Upgrade 1070 or Rx 480/470?

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If by chance is your father going to be near the Washington/Oregon border? It'll save you a bit of cash if he could buy the 1070 in Portland to avoid WA's very high sales tax. Seattle is the worst as it's basically 10%! Not sure if you can get sales tax refunded if you're not a US citizen?

My dad's friends in Washington is able to buy using his credit card so we will be able to save tax and buy online, he recommends using Amazon, i dont know if New egg has the free return policy.
So is it better to buy the 1070 in a brick and mortar store. or purchasing online and have it delivered to my old man's friends house?
1070 - Newegg.com

Here are my final thoughts
EVGA SC has high temps , but the FTW is better because it has:
- More power phases
- Dual bios
- RGB LED's
- First card in the range with hand picked silicon.
Considering this is FTW worth the extra $?

I have my doubts about the MSI due to some artifacting issues there was back in august, have they fixed that?
http://i.imgur.com/4R59U92.jpg
Otherwise, what MSI model is the best right now?

About the space in the case im a bit constricted cuz im forced to use the lower PCIE slot, i broke the upper one some time ago, stupid accident xD. Daño Slot PCI-Express , i hope ill be able to put the card under there again.

Asus Strix is very similar to MSI gaming x in temps. I if were to choose one of these 3 cards. which one you think is the best choice? Considering OC capacity, Cooling and Reliability

Asus temps: ASUS GeForce GTX 1070 STRIX Gaming review
msi temps: MSI GeForce GTX 1070 Gaming X review
evga sc temps: EVGA GeForce GTX 1070 SC Gaming review

Its funny how the FTW is cheaper than SC on Amazon, i wonder why
https://www.amazon.com/EVGA-GeForce...c&ie=UTF8&qid=1472068807&sr=1-1&keywords=1070
https://www.amazon.com/EVGA-GeForce...c&ie=UTF8&qid=1472068807&sr=1-4&keywords=1070

Thanks for your help compadres