I love all that SID chip stuff, the C64 has quite amazing sound capabilities. VIC20's sound came from the VIC chip, and its quite amazing what could be done with 3.5 kilobytes of RAM.
Unfortunately, my favourite machine, the C16, was not so well endowed. To save money, the TED chip was created. Much better graphics, but poorer sound.
Lot of northern Euro's big into that scene. Great stuff.