Then I would go for RX580 or GTX 1070. They have a comparable hash rate if the RX is tweaked, depending on the algo the one or the other is faster. RX580 should be cheaper though. For me (0.30 USD per kWh in Germany) power consumption matters a lot, so the RX was no option as the Pascal based cards are a lot more efficient when fixed to low voltage. My GTX 1060 only use 45-50W for monero mining while producing around 530 H/s, RX570 had over 100W and hash rate was not much better without BIOS mod.
Thank you for your help
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)