[Purchasing Help] Pondering a Monitor Upgrade

I currently have an acer s231HLbid, an older 1080p acer IPS display. it's super thin, has hdmi/dvi/vga, and a vesa mount. i have 3 problems with it. the first is that the height is not adjustable, which would be a nice feature to have right now. the second is that recently when i was trying to set it up on the desk without the stand, it fell over and got a couple of little scratches on the screen. they're pretty deep, and while they only cover probably 20 pixels total, it's annoying to see those spots in the corner of the screen. the third is that the glossy bezel and stand with no adjustments feel kinda cheap, and i'd like a monitor with a "premium" feel to it. with that in mind, i've found the AOC i2367Fh, but a lot of people seem to have beef with the stand, which is apparently wobbly. if it wobbles when i touch it, i have no problem with that, but i want it to sit flat and even when i'm not moving it, and i don't know if this can do that. the other main similar monitor that I liked was the Dell u2414H, which is more than i was hoping to pay for a regular 1080p monitor. moving away from those 2, i liked the Acer G257HU smidpx, which is one inch larger, like $20 more expensive than the dell, and is 1440p, and looks good as well. the only issue I would have with this is how well pixel scaling works if i were to plug in an input only capable of 1080p or 720p or something similar, which leads to the next monitor, which is a bit more expensive, but i think it would suit me well, because I watch a lot of movies, and also enjoy the screen real estate of 2 monitors, but only have oom for 1 at the moment. the LG 29UM67 fits just about every need I have for a monitor, but I'm hesitatn to just go for it because I have a question that i haven't been able to get answered: if i use the hdmi and plug in, say, an xbox that displays at 1080p 16:9, would it display in the center with black bars on both sides, or stretch it across the extra real estate, distorting the picture?

are there any monitors that I didn't consider, but should've?

TL;DR: get a better 24" 1080p, upgrade to 25" 1440p, buy an ultrawide or just stick with current monitor until the other options become cheaper?

side question: what happens if I plug a raspberry pi into a 1440p monitor with hdmi?

Submitted by DukeOfDownvote Xbox 720 Release Date 2015