I have a few 1750 Armadas that I used to use for compatibility testing and debugging of software since virtual machines sometimes hiccuped on software that ran fine under real hardware. There was an incompatibility with eCS 2.0 Beta (mouse driver? CD ROM driver?, cannot remember) that we or Mensys never solved, but I do not think I ever tried 2.0 release or 2.1, I just vent back to 1.2, Amouse was OK under 1.2 and the system in general ran very well especially if you maxed out the memory.
BTW the best video driver for them is the old pre-gradd driver, it has a minor bug in that the video display file does not have/create the correct size/frequency setting for the screen but that can be fixed by editing the file in text mode. Overall the original driver is much faster and less problematic than SNAP or Panorama.
There are more than one version of the 1750, the mouse and audio boards have different but closely related hardware, but very different layout. Audio is slightly flaky under any OS (Shitty chip), but works using the original drivers, did not test genaud.
The USB chip is a very early custom Compaq unit and has a known hardware bug in that it reset itself every now and then, but apart from that works fine in eCS, Win NT, Win9x, Win2K and WinXP, just as long as you realise that it is the hardware that is glitching on an occasion and not the drivers.
Although the reason I bought them at the time was simply that I could pick them up for 20 pounds apiece, they were actually quite usable, I ended up using one as may main OS/2 system and an alternative WinXP system for a few years. eCS ran fine but XP needed to be stripped to the bone to run in the rather meagre memory on offer, but the system could take larger disks than advertised and I managed to have a shared fat32 data partition so I could keep just one browser and email profile for both Windows and eCS.