I also agree it is far more than you need, also many of the components are not compatible with one another.
That motherboard is designed for servers, it will not perform as well for desktop applications as a cheaper motherboard, which is designed for desktop applications would.
One issue is the Northbridge Chipset, with the one on that mother board you may have trouble getting crossfire or SLI to work.

Quickly put together this suggested build, it will run 5 WoW's smoothly:

Motherboard: http://www.newegg.com/Product/Produc...82E16813131386
CPU: http://www.newegg.com/Product/Produc...82E16819115202
Memory: http://www.newegg.com/Product/Produc...82E16820226049, 2 sets should be more than enough, remember to use a 64 bit OS
Video card: http://www.newegg.com/Product/Produc...82E16814102840, only need one, save your money
Video multiplexer: http://www.newegg.com/Product/Produc...82E16815106011, since you wanted so many monitors these will allow you to have just 1 video card give many outputs
Hard Drive: http://www.newegg.com/Product/Produc...82E16822148337, Don't bother with SSD just yet. I own one, yes they are fast but in my opinion just isn't worth the cost at the moment
Case: http://www.newegg.com/Product/Produc...82E16811133071, of course it is up to your personal preference this is just the one I chose, when choosing be sure to pick and ATX form factor
Optical Drive: http://www.newegg.com/Product/Produc...82E16827106225
Edit: PSU: http://www.newegg.com/Product/Produc...82E16817339028
This setup will be a fraction of the cost, however will definitely be more than enough to run 5 WoW's perfectly.
Estimated cost : $2150