I've posted this here before, but a 25-year old Amiga 2000 still provides background music at home (when the wife is away). A couple hundred megs of Mod files provide hours of nostalgia. Some people meditate with incense, Amigans ruminate to the sounds of 80s tracker beats.
I've tried replacing the machine with emulation, but there is something comforting in seeing the old girl in the corner singing as well as she ever did. Perhaps devices living beyond their natural lifespans comforts man's worries over his own perishable nature.
For the slightly less "adventurous" in terms of music, here are two great alternatives that provide modern remixes of Amiga and C64 music. I often find that the remixes are better at evoking the feeling I remember in cases where the originals often feel underwhelming when hearing them again. I think the originals are in general easier to listen to for those of us who grew up with the sound (I do listen to quite a bit of the originals too, as well as other chiptune / retro music)
Quality is varying; sort by rating, and check out some of the IK+, Delta and Commando mixes as "easy" introductions where the original tracks have kept well)
http://www.amigaremix.com/ is also great, but the irony is that because the Amiga sound is/was so much more sample driven, I find that there are fewer remixes I like; often because the originals are good enough that bad remixes are much more obvious.
daXX is a consistently quite good arranger to look for (also for C64 remixes). There are many other good ones, but daXX is good for consistency across the board.
Reyn Ouwehand is also highly notable, especially for being a guy that composed original music for the C64 and Amiga (such as for Last Ninja 3), that then went on to a career in the music industry, and has continued to do remixes of C64 and Amiga tracks as a hobby.
Here's a sample of a great mod: http://www.youtube.com/watch?v=dZWgXiVJbpI - albeit from a lame demo. There are thousands more available at aminet.net.
I've tried replacing the machine with emulation, but there is something comforting in seeing the old girl in the corner singing as well as she ever did. Perhaps devices living beyond their natural lifespans comforts man's worries over his own perishable nature.