Feedback on 1080

Hi,

I would like to buy an 1080 to replace my GTX 980, and would have your feedbacks on these 3 cards :

Nvidia's website :
http://www.geforce.com/hardware/10series...e-gtx-1080
2560 cores - 1607 Mhz (base) - 1733 Mhz (boost)
-> reference design


MSI GeForce GTX 1080 Founders Edition
http://www.newegg.com/Product/Product.as...6814127940
2560 cores - 1607 Mhz (base) - 1733 Mhz (boost)
=> This card looks like the Nvidia one, isn't it ?! What's the differences ?


MSI 1080 Gaming version
http://www.newegg.com/Product/Product.as...6814127943
2560 cores - 1607 Mhz (base) - 1847 MHz (boost)

The last one is more boosted than Nvidia's one. It should crack faster ?

Last thing, price : more than $800-$900 in Europe. Does it worth this - high - price?

Thanks for your feedbacks.