The IIGS is an EXCELLENT machine. My cousin had one of the Woz edition, and it was brilliant. It pooped all over PCs... I loved that machine.
Try Out of This world. If the emulator has extra soundcard emulation, it will be brilliant. Most atmospheric version I played thanks to its sound. I do remember my cousin's machine had great sound only because it had that extra card.
By teh way, the IIGS is an 8bit machine. neat eh?