The Rampage is a LGA 2011 board, others Z87
Which I'd use would depend on what your goals are.... If thinking SLI / CF with more than 2 cards, you have to go with the Extreme or Rampage.
The Sabertooth is a great overclocker, but not exactly geared towards gaming. The GIGABYTE GA-Z87X-D3H is an entry level board @ $140... all the others are over $200, Sabertooth ($250), Maximus VI Extreme ($370), Rampage ($430)
The best board IMO, for gaming and overclocking, 2 GFX in SLI, is the Asus Maximus VI Formula ($300) .... great OC features, set up for optional water cooling, great sound, RAM, hi end chokes and caps, sonic radar and, not that it matters in this context, but the best looking MoBo I have ever seen.
http://www.vortez.net/articles_pages/asus_maximus_vi_formula_review,1.html