I know there are a lot of threads about cards
But i just want a simple opinión of what you think is best
Consider im from Perú and bringing this cards from Usa to my country have taxes and shipment so it would be 40-50$ in that, so i have this options im local stores with local warranty

Gigabyte Rx 470 4Gb (GV-RX470G1)       240$
Gigabyte Rx 480 8Gb (GV-RX480G1)       320$
Asus Rx 570 4Gb (90YV0AJ0)                  245$
Asus Rx 580 8Gb (90YV0AK0)                  355$
Msi Rx 580 4Gb (Rx580 Gaming X 4G)    274$
Msi Rx 580 8Gb (Rx580 Gaming X 8G)    320$

Thanks all for your help