I have about $600 and would like to know the best graphics card I can find for that money
I also think that if you want to buy a video card for mining and use it during the 3 year warranty period, then it is better to buy 4000 series, but not hot video cards. My observation about the hashrate on new coins in this post
https://bitcointalk.org/index.php?topic=5447543.msg62038432#msg62038432