Soldato
Utter rubbish. Text size will be whatever size the app allows.
In this case it's browser based so you could just use browser zoom as well as per monitor doing scaling whilst remaining at native resolution.
The 25" superwide will be terrible and suffer from the exact issue you are trying to describe - the dot pitch is smaller than the typical 1080P 24", same as if the op went with a single small 4k screen, yes the resolution is the same as 4x 1080p screens, but you need to go 40"+ to get a useable dot pitch.
im aware about screen scaling for zoom, the point was it would look terrible on 6 screens if its setup to portray one big screen, if he was to have different things on each monitor then fair enough, but the OP hasnt mentioned such and not all monitors will look right zoomed in,
well i chose the screen because its widescreen and cheap considering lol, i personally dont see the need to get too big of a screen either way unless you sit on the sofa.