My current choice is between rx 470 8gb and rx 480 4gb, with the rx 470 being about 15 euro per piece more expensive.
rX 480 IS 7000 MHZ vram and rx 470 is 6700 (practicaly the same).
Do you have an opinion between the two?
I would go for the RX480 8 GB cards, which is what I was referring to in my above post. They are probably going to be more money yet, but in addition to the memory you will also have increased memory bandwidth (speed) which usually has a positive effect on hash-rate even for algorithms that do not need 8 GB. AMD has a new line coming out next month RX570/580's which are basically re-brands of the current versions, but it might drive down the price of the current generation.