For your uses, assuming you aren’t using headphones or speakers connected to the monitors, DVI should be just fine. HDMI would get you that audio connection (if the monitor has it).

We use a lot of DP to DVI at the office (the monitors are an old HP model that refuse to play nice with DP to DP) and it largely “just works”.

1080p games upscale really well on even my few year old cheaper TCL Roku TV. If we could get 1080p 60 FPS more steadily, that would be good enough, and I’d imagine most of their audience wouldn’t care about the extra pixels.