If you need more than 550W, but no more than 650W, the Superflower PSU is not a bad PSU. Otherwise, since the Seasonic-built XFX is cheaper and more efficient, it is the better choice vs. the Superflower in all cases where it provides enough power for your needs.
I'd say if you are fairly sure you are going to CF/SLI down the road,
go with the Superflower. I don't know about their Amazon series,
their Golden Green & Golden King series are highly regarded, they make quality PSU's
these days and I wouldn't have an issue with purch one myself.
Alright, thank you guys alot for all your responses.
I went with the XFX, based on your response and research.
Also based on the looks.. Only if Super Flowers psu wouldn't be so ugly xD.
Can't wait to get that baby on my hands, also ordered Corsair 300R couple days ago for my new build.. I just can't wait!
Sry for the double post again.. I was so urgent and the poll didn't work :S
Thank you guys again!