What switches does it have? Are they lubed? Are the stabilisers modded? Does it have case foam or other case mods? What type of mount is it? What about the plate? Swing weight and force curve? Linear, clicky or tactile? Silent, oring, ball bearing mod?
There are so many different variables and that’s before you even get to layout changes it’s perfectly possible to build your own keyboard that is perfect or close to it for you.
I have keyboards with different layouts and typing feel that I pick for how I want my typing to feel on any given day. It’s no different from a guitarist having multiple different guitars chasing a different feel and sound.
Not everyone is going to appreciate it and that’s perfectly fine, but there are significant differences with the right changes during a build.
Normal hifi gear, particularly second hand can sound way way better than generic computer crap. However normal hi-fi speakers are designed to work best a certain distance from the wall **and ** a certain distance from you. These distances vary between speakers but it is important to check this before spending any cash as some speakers need to be many feet from you, which isn’t always remotely practical for most pc setups.
I went with Dali Minutes for this reason, so they can be right on the wall and really close to me. I paired mine with a Rega Brio amp and RME ADI 2 USB DAC, then added a monitor audio sub later.
Most proper studio monitors are designed for near field listening they also make a good choice although they can be a little clean for some people’s taste.