Remember that different headphones and IEMs may need a lower noise floor or different power characteristics. It’s also worth noting that it’s relatively common for amps to perform worse when the current draw increases.
https://www.youtube.com/watch?v=PqlcJnoIcGo
I have not seen exhaustive measurements of this amp, but it seems to be good for many, but not necessarily all, headphones.
The catch is that this particular headphone draws a fair amount of current. Potentially more than a regular receiver will put up with without the distortion going up. It’s hard to know for sure with receivers since the relevant specs are almost never published.
If you’re in north America, Schiit Audio currently has a closeout sale on their Magni+ amp for 80 dollars. That could be a good choice.
The potential crux of hooking up an amp to the headphone or line-out port of a PC is that if the internal soundcard is picking up electrical noise, an amp won’t get rid of it. You’d need an external DAC to fix that problem if it happens.