Points about Crossfire/SLI:
1) SLI is superior in number of games and frame rates within games.
2) 2xSLI/Crossfire is very problematic for microstutter (please no rants about it's a non-issue now. This issue is being heavily studied now and it IS a big problem. For example, most experts recommend the Titan rather than a GTX690 because the Titan provides smoother gameplay whereas the 690 has higher frame rates but has stuttering issues like all dual-GPU setups).
3) 3xCrossfire strangely exhibits far less microstutter.
4) 3xmonitor AND 3xCrossfire/3xSLI (*This is an area I'm uncertain of though I've heard people mention issues with having Crossfire/SLI and using multiple screens at the same time. AMD has an FAQ section for Eyefinity you should look for.)
Other:
Personally, I would far rather game on a single LARGE, high-res monitor. Dell has one for $700 that is awesome (not the U2711). I forget the model but it's a 27", 2560x1440 screen and there are two with similar names but it's the cheaper one.
I have a GTX680/i7-3770K setup and game mostly at 1920x1080. There's roughly a 30% frame rate hit to up to 2560x1440 but the games rarely look any different. Exceptions tend to be games like Diablo 3 and Starcraft 2 which have small text/HUDs so the interface looks much sharper.
SSD:
You're going to want to do two things:
1) upgrade the firmware (may have to use a CD or USB boot method with Windows 8 and Samsung's Magician software)
2) apply overprovisioning (Samsung Magician). You never want to exceed 80% usage so overprovisioning simply pre-allocates this for you so you can't use it.
HDD vs SSD and gaming:
I've been testing this and discovered SSD's have little overall impact on gaming. Load times can be greatly affected (Skyrim, Fallout 3 etc) and some stuttering due to frequent loading is improved (Assassin's Creed 2 and other games) but overall it's not a big deal.
In the end, I have a setup like this:
SSD#1 - Windows/apps
SSD#2 - Second Steam folder (ONLY for game I'm playing. When done, I backup with Steam and delete the game locally to free SSD space).
HDD - everything else, including STEAM
WINDOWS:
Get Windows 8 64-bit OEM, and Start8 from Stardock. Don't buy into the "Windows 7 is better" hype. For example, Win8 has a Secure Boot function to prevent malware hijacking Windows at boot time. Requires a UEFI BIOS motherboard to work.
Corsair H100:
No big beef, but isn't there an improved H110 model?
Summary:
My main issue is the Crossfire problems, and my recommendation that you go with a single card (Asus GTX680 DC2T or similar 3-slot HD7970) and game on a 27" 2560x1440 Dell monitor rather than a 3x screen setup. That doesn't preclude a second non-gaming monitor though.
Just my thoughts.
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