The world of OS

The three major operating systems (OS) on the desktop are Windows, OSX and Linux.

 

You will find many hot debates, most of all between Mac and Win (the Linux guys are too busy with hacking to be able to join) but there isn't any hard evidence that one is superior to the other as far as sound quality is concerned.
All are able (if configured right) to deliver bit perfect output.
They all run on more or less the same hardware.
Not to be mistaken for running on all hardware, that’s the stronghold of Linux.

 

The impact of operating systems on sound quality is discussed here.

Getting familiar with computer audio and learning a new OS at the same time is probably for masochist only. Stick to the OS you are used to unless you have compelling reasons to switch.