Looking at it at strictly a performance versus maintenance required standpoint:
My wife's sewing machine. It's over 15 years old and never needed anything done to it at all. Still hums along to this day as she is putting a quilt together.
From my stuff, all of it is still pretty new as I am purchasing my own stuff instead of using my dad's equipment. That said, I've got a nice computer that is now 5 years old that I can count on one hand how many times it's been turned off over the years. Still runs great and haven't even so much as blown the dust out of it (I should do that, however, I'm just being lazy about it).