I'm not in the AMD or NVidia fanboy. Personally I think you should have as much loyalty to a multi-national company as they have to you i.e. none but its definitely true both AMD & NVidia have their fortes. AMD do seem to be the pixel pushers of the two. Shame they can't push out a driver in less than 6 month intervals though. My other machine runs a GTX 780m 4gb which as a mobile variant NVidia don't even allow triple surround which is just stupid on a 4gb card. As you said Eyefinity is much more flexible than NVidia surround and running 6 monitors the green team just couldn't work for me so red team is was. Advances in VR will make systems like mine effectively obsolete so I can see why NVidia aren't too pushed with going above 4. Its not exactly a mass market audience outside of nuts like me, or traders. Would be nice to see NVidia SLI with DX12 allowing each card to output to 3 monitors using their own ports just as vram stacking will allow full ram usage of both cards but I guess we'll have to wait and see.
Couldn't agree more on using triples. Anyone on 1 screen considering going triples or 3440x1440 really should. For gaming and general productivity its a revelation.
Spot on re power consumption for the monitors its 150W. Main PC is approx 230w at desktop driving 6 monitors with movies, browsing, twitter, email, all active going to 650w approx when gaming full throttle on the 6 so not all bad. Probably 200w extra for everything including the buttkicker & surround going so 1kw total full pelt. I'm Irish so I calculate in the pint vs performance system. If one beer in a pub costs €5.50 & lasts 20 mins and 1kw ph of electricity costs 15c I get 36.67hrs of gaming for the price of one beer which is a great deal imho. If anyones other half ever complains just do that calculation and thats the argument over.
Damn your beer is expensive O_O. We pay so much only for imported irish beer, the local brands are cheaper. 3€ average in smaller towns, 4€ in the capital, so at least getting drunk here is cheaper

Power costs more, 25ct here.
But a really nice way to calculate the price for fun per hour
And for the power.. I have a small issue with the CPU being overclocked that hard, it pulls almost 200W alone. Its a beast, that allows me streaming 1080p 60FPS in ANY game avaliable (well we dont count star citizen cause meh - thats the next game that will move my behind into the lovely PC shop instantly).
I can see where Nvidia is going with the current multimonitor setup - 3x high resolution should be enough for anything, be it 4K or 21:9 1440p.
The 4th monitor, usually above, is nice to have but really nothing that can be useful in most games. Sure you can put your infos from BF4 on it, but most games dont support this config at all. Multimonitor gaming was always a mess, AMD is doing way better in this area. Maybe the new 390X will be worth it, because anything below it looks like a rebrand (again). Generally AMD gives you more bang for the buck specially at high/highest resolution, but your setup is really crazy.
DX12 and SLI with the new driver by Nvidia.. Would be cool, but i doubt it. They will most likely stick to the current idea of how it should work, but the card itself could use all ports. The main point for me was the triple displayport output on my 970 and displayport is way superior than DVI & HDMI and i hope most next gen cards will have it.