My mom still has her Vita-Mix too (it's at LEAST 25 years old - probably a few years older than that). I ask for it as my present every Christmas, but she won't budge.
If you can afford it, I recommend a Vita-mix. They are costly though.
I don't blend enough to justify the expense. I have a commercial model oster (I got free because someone thought it didn't work - but it really just needed some tweaking) and a KitchenAid blender (it's about 6 years old). They work okay.