I'm debating getting a 3440x1440 monitor for coding and because I hear they work well with tiling window managers (hence the question), it's just annoying that I have almost no chances to try them out for free, and also the cost is enough that I wouldn't get one without serious consideration first. Although you have nudged me a bit closer to "maybe I could get one without testing them first, if it's second hand and cheap(er)".

Also I'd be replacing my existing 27 inch LCD with it, and keeping the 4:3, 21 inch CRT, for a highly cursed monitor setup, where everything gets letterboxed or pillarboxed. And then to make things worse, I could grab a 16:10 monitor to put in portrait besides one of the other two, for maximum "what is 16:9 and why do I have black bars on everything".