I might crossfire in the future and with the G43 I would have to use PCIe 3 and 2 for the other GPU so I wouldn't CF with it, but I would have a cool and quiet Asus R9 270X and then I would replace it in the future with something else. OR should I
Get the Sapphire R9 270X dual-x and get the G45, so in the future I could get another Sapphire R9 270X and a better PSU and CF?
I wouldn crossfire it at all (more unsupported games) unless you are going to use more than one monitor o play at higher resolution than native 1080p. but if you need to know i would shoose the second decision.