Chally,
We bought the Vitamix Professional Series 200. I believe they go all the way up to an 850 series and can cost as much as $800. We paid $389 for ours on ama zon. Laurie is right, you can get warranted refurbished models on the Vitamix site. One thing about mine, although it works wonderfully, it is very tall and won't fit under our kitchen cabinets. You might want to check out the under the counter models.
It was so worth the money to me. Good luck with it.
Vince