Graphic Card Outputs for FSX - a Dilemma!

I'm almost now at the stage where I'm about to start buying the components for the computer that's going to be driving this beast and I've hit a bit of a barrier.

To begin with, I'm probably going o need up to 6 video outputs from the system - 2 short throw data projectors, 2 standard 19.5" LCD monitors and 2 touch screen monitors (one large for the overhead panel and a medium sized one for the FMC).

The problem I've got is that having done some research it seems that using two graphics cards with FSX doesn't seem to work too well (SLI or crossfire) - going by what one of the top Flight sim computer builders, Jet Line Systems, has to say.

http://jetlinesystems.com/performance.php 

I have now emailed Jet Lines three times, but have yet to receive a reply about what they can offer as a solution.

So, I know there is a solution because others have been there and done it, but what is this solution - If anyone knows please post a comment

Gigabyte GeForce GTX 980 can provide up to 4 outputs from its 6 ports

At the moment, it's back to the internet to do more research to see if I can find a solution.....If anyone reading this blog has any advice, please feel free to offer constructive comment. Thank you.