I have a chance to buy some extra miners, but what will be the best choise for the future? I have seen the results on the wikki but there is a r9 290x with the 390x bios mod is it worth the chance for further future? I think the 390x maybe have some more profit in the future but i'm not so sure between this two. I can buy for the moment for the same price 3x - 290x 4gb or 2x - 390x 8 gb? The 390 is also the same price for me as the 390x. Any suggestions? it is the intention to build up even further in the future. The wattage will be not such a problem after 8 months. I just will to be sure for the best choise for evolutions in the future for hashrates and share founds.