Trying to decide on which monitor to use as my main display. I have two dell's, a 2309w, which has an unusual but pleasing 2048 x 1152 panel size Or a p2212,1920 x 1080. Both are great displays but I can decide which one to use as my main display. The only thing I find when looking for wallpapers and bing desktop images the 2212 looks better as the images are modelled for that aspect ratio. Intended use is Web and gaming.
2048x1152 is still 16:9 so best bet for nice clean wallpaper would be taking common 2560x1440 wallpapers (also 16:9) and downsampling them. My instinct says you might be better off going for the 1080 display just because the difference is in resolution fairly small and the ratio is the same but an atypical resolution can sometimes cause slight headaches whereas 1080 is ubiquitous.