Asus,Zotac or MSI?

I think they are all going to be very similar reference type models, unless Zotac has an AMP! version out. I recently RMA'ed an Asus video card and had a good experience with getting a replacement. I also think the Asus may have a slight factory overclock.
 
Looks like Zotac does have a GTX 570 AMP! clocked at 780 mhz. Still, it looks like it comes with the reference cooler (which is great by the way).
http://www.guru3d.com/news/zotac-geforce-gtx-570-amp-edition/
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