I can't consider 16:9 as anything but a gaming resolution, because it's just no benefit for pretty much any other type of use, except maybe watching YouTube videos. Photographs aren't 16:9 format, applications aren't 16:9 format, BluRay movies are rarely 16:9, music creation isn't any format in particular, so there is just no justification for it in anything I use my PC for. It's a horrible, overly-wide viewing experience that I find unpleasant to use, my brother thinks it's brilliant... horses for courses.
There are three critically important components in my PC... the mouse, the keyboard and the monitors, none of them are ever worth compromising on. I have a Microsoft mouse, because it feels right, I have a Cherry keyboard (a proper switched keyboard that is), because it feels right, and the monitors have to be exactly what I need. I went through four buy & returns before I ended up with my current NECs and have been though more than that in the last 3 years trying to replace them.
Higher resolution just means more pixels to drive for no benefit. All you end up doing, is getting a higher resolution, then scaling your fonts up so you can read the text... which completely negates the higher resolution. I need a dot pitch of around 0.27mm to be comfortable. I have very little gaming software on my PC, but all of that would immediately be hit by a massive performance loss going to 2560x1440, and all for the sake of more pixels. It's all about balancing size, resolution and performance.
I also need two monitors, and two 27" monitors is just impractical, and likely to give me headaches based on the distance I sit from my monitors. I don't buy into all this must-have-more-pixels philosophy, I just need *enough*, and 1920x1200 would be enough... heck, 1680x1050 is enough.
Excessive lateral eye movement is a prime candidate for causing eye-strain and headaches (for me anyway), so I have to balance my distance to viewing width. 2 x 24" is borderline problematic, 2 x 27" would be guaranteed trouble. In an ideal world, I would go for 2 x 22" 16:10 IPS screens @ 1680x1050, but they're even harder to get hold of.
I know it's probably very difficult to understand my rigid stance on size/aspect ratio etc... but when all you've done in your life (32 years of it anyway), is spend up to 18 hours a day looking at monitors, you learn that they are the most important part of your system. It's something I never compromise on... but that's just how I am. That also means that it is a constant stream of buy & return as I go through replacements unfortunately.