Unpatched OS/2 2.0 is a bit of a nightmare. It has a load of bugs and is still running the 16 bit GDI. The large service pack improved things somewhat.
If you must run 2.0, try a 486 with a least 8MB RAM. Cirrus Logic worked fine in OS/2 2.1. It also won't like large disks at that point without patching in later drivers.
You're best using at least OS/2 Warp 3, or Arca OS if you want an easy life, ideally in a VM. After all, there is no accelerated 3D graphics, the standard sound support should be fine, and the less than common options for TV capture/watching (terrestrial, now useless as it's now all DTV at least in the UK) and MPEG 1 acceleration aren't up to modern standards.
I have two OS/2 systems - a P2 300 running a heavily patched Warp 4, and a physically hacked Xeon server running Arca OS including dual monitor support! The dual monitor support turns out to be more irritating than useful, because games such as Galactic Civilisations 2 spread themselves out across both monitors and look awful.