Im want to buy new GTX 1080Ti or 1070 for my new rig

I have some questions:

1.Between 1080Ti vs 1080 vs 1070: which is the best option right now

2.Which brand will give me the best hashrate; MSI vs EVGA vs Gigabyte Aorus vs Colorful etc

Im from South East Asia and my plan is to ship some card.

P/s sorry for my bad English.