1080 as you can push it really nice.
Go to newegg if you;re in US, find the one you like and add notifications.
Once you get a email just run order and enjoy.
I got my card a week ago like this. They are constantly restocking them. Also price for me was nearly $40 less than 5 minutes after I completed the purchase.
I got this one. Stellar reviews and not bad price.
I sold my 970 G1 on ebay for nice price too. They are selling like hot cakes. https://www.newegg.com/Product/Product.aspx?Item=N82E16814487244
Cryptocurrency mining. I don't think they will go down in near future.