Hmm...Interesting?!
I am not going to read through all of these posts but a couple things caught my eye and one choice is a problem.
If the plan is 3xHD (~5900x1080 ; bezel) then the Sabertooth Z77 is a huge mistake. You'll very quickly find bottlenecks of (2) flavors: 1. 2-WAY SLI or CF, 2. vRAM bottlenecks with 2GB vRAM. Forget and 3D with 2-WAY, 2D with highest details and high AA will be choppy.
Therefore, I'd either look at a 'PLX' equipped Z77 or go a different route and choose X79/LGA 2011. The cheapest Z77 + PLX is the GIGABYTE G1.Sniper 3 and others include (high to low priced): ASUS P8Z77-V PREMIUM, ASUS Maximus V EXTREME, ASRock Z77 Extreme9, ASUS P8Z77 WS, EVGA Z77 FTW. Out of those my preference is either ASUS or EVGA.
Next, GPU's either the GTX 670/680 4GB versions or HD 7970 3GB in 3-WAY SLI/CF. SLI then either EVGA or ASUS or CF I prefer XFX or ASUS. Note even the GTX 690 is 2GB vRAM of each GPU internally in SLI.
Also, never 'WiFi' a desktop the ping rates will drive you nuts not to mention the unstable bandwidth jumping up and down like the bouncing bunny. Either CAT-5e/6 'wired' or PowerLine solution; see
http://www.youtube.com/user/NCIXcom/videos?query=PowerLine
Hopefully, 3xHD is not part of this any more with a 2-WAY limiting MOBO.
Example note 4xAA; newer games are just going to be worst: