Monitor advice for xbox one S

hi everyone, soon i will get xbox one s and i will need to buy a monitor. But actually i dont want to pay more since i have to sell it before going back to my country in summer. So i found some monitors with 1440x900, 1680x1050 and 1920x1080 (which is twice expensive than 900p). All of them have no hdmi port so i will need to use hdmi to dvi cable.

Now, i have some question, as you know xbox 1S supports 720p, 1080p, 4k. Will i be able to play need for speed 2015 (900p resolution) on 1680x1050 monitor with its 900p resolution or it will convert to 720p?

And what about if i buy 1080p monitor, can i use upscaling?

actually 1440x900 monitor costs 40$ and 1080p costs 80$.

https://www.olx.pl/oferta/monitor-dell-20-2009wt-gwarancja-w-stanie-dobrym-CID99-IDbswod.html

https://www.olx.pl/oferta/monitor-led-23-dell-professional-p2312h-klasa-a-gw-CID99-IDooTre.html