Hi
I am newbie so i need your guide please
I want two buy one or two GPU For mining
can you please tell me which GPU is better to buy

My mean is i want it support all altcoin and i want futureproof
for example some place wrote GPU will not support ethereum soon

so I want to buy GPU that can support all other coins or altcoin

* can you please tell me Model name ? and which brand is good to buy
* AMD or Nvidia  ? ( some place wrote AMD not support all coin but NVidia support all , is this correct ? )
* which model have high hashrate ?
* price about $900 - $1100 ( sometime i find expensive model with good price ) 
hope you guide me
thank you