The 'much' cheaper asus board is the P5N32-E SLI dont go for the plus version of this board as apparently its a hybrid of a 570 chipset and something else.
I got the P5N32-E SLI but it was faulty and i sent it back for replacement, so cant really comment on it....yet
. Only issue i had with it is that you need to connect the SATA cables to the board before installing it in the case as theyre in the most absolutely stupidest position.
The board got great reviews, it wont overclock as high as the eVGA 680 board( difference is marginal ) but as you dont want to overclock anyway....