Are the "iGame" videocards from Colorful good or just LOOK good?

I am going to build a new rig soon and I was thinking about one or two GTX 560 or one GTX 580, havent decided yet. I found these iGame videocards with a wicked awesome looking design and I was like OMG thats my new video card lol... But then I started to think that its not that much more expensive from the reference model but the looks does not even similar so is it really better or its just eye candy? Oh yeah and I havent found any proper reviews of them... Opinions?