Lutfij :
By how much do they all vary in price? I'd get the Strix. Just to be double sure can you pass on a link to all the cards you've listed? On another note, what is the make and model as well as the age of the PSU?
MSI 6GT OCV2 - Rs. 25370 = $350.95
https://www.primeabgb.com/online-price-reviews-india/msi-geforce-gtx-1060-6gt-ocv2-graphic-card/
Asus STRIX - Rs.25500 = $352.75 (here the offline price is Rs. 25500)
https://www.primeabgb.com/online-price-reviews-india/asus-strix-geforce-gtx-1060-oc-edition-6gb-gddr5-graphic-card/
Gigabyte Windforce - Rs. 24161 = $334.22
https://www.primeabgb.com/online-price-reviews-india/gigabyte-geforce-gtx-1060-windforce-oc-6g-graphic-card-gv-n1060wf2oc-6gd/
Zotac Amp Edition - Rs. 24000 = $332.00
https://www.primeabgb.com/online-price-reviews-india/zotac-gtx-1060-amp-edition-graphic-card-zt-p10600b-10m/
I am from India and currently 1 usd = Rs. 72.29 (INR)
Planning for i5 8600k with Asus Z370F gaming mobo, Corsair VS550 PSU