I would go for the XFX. It's basically a Seasonic unit, look fantastic, and can go with basically any colour scheme (it's neutral).
Components will have lower power consumption as technology advances, not higher. So invest your money in good quality, not high power. A 600W-700W is more than enough, even for 2 graphics cards.
XFX Core Edition PRO550W (P1-550S-XXB9) 550W ATX12V 2.2 & ESP12V 2.91 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Active PFC Power Supply < Is plenty of power to run your setup , and it's made by Seasonic