Like the OP, I, too, still use an old Boston Acoustics speaker set. Mine came with the first desktop I owned, a Gateway system back in 1998. While everything else was outdated or junk in a few years (heck, it wasn't a good system when I got it - too many BSODs, no dedicated graphics, either), the speaker set I still have as well as the keyboard. It's funny that basic systems back then were in the $1,500+ range, but the peripherals well outlasted the computers. No computer builders are going to throw in quality peripherals anymore when the average cheap desktop is $300 to $500. I still use the keyboard (PS/2 connector) with older computers that I repair. Not quite model M, but the keys are plenty clicky and it feels solid.
This speaker set isn't my main one, but I use it from time to time with either my laptop or a computer I'm setting up/testing. My Logitech Z-5300e set is at a friend's house right now, but the Boston Acoustics speakers are still pretty good quality. If you happen to see them for dirt cheap online or at a garage sale I'd still recommend them.
EDIT: I think I still have my 4GB hard drive from that computer.

I don't regularly use it, though I did check if I had anything on it from 1999 a little while back. Damn nostalgia, now I want to play a game of Descent II, Comanche 2, or MechWarrior... 2. A lot of good action/simulation games from that era...