What's your Monitor Size?

[Gilraen]

I used a 15" widescreen laptop monitor. At 1920x1080 it suits my needs just fine.

[Rydin]

I used a 15" widescreen laptop monitor. At 1920x1080 it suits my needs just fine.

You don't catch many 15 inchers that do 1920x1080.... nice

3600x1920 3x Dell Ultrasharp u2412m

Portait is overall better than landscape, it keeps the 16:9 (1.77:1) aspect ratio so you don't have to worry about you don't have to deal with stretched out textures when using 3+ monitors

Less head movement and peripheral vision required also.

The only drawback is you pretty much have to have a IPS panel monitor or you will suffer from poor viewing angles if you use TN panel monitor

5760x1080 in a game like Final Fantasy. I'd rather see more of the peripheral vision landscape than more sky and ground
As long as the game supports 5760x1080 you shouldn't have any texture issues.
going portrait, you might as well have one screen