Which Vitamix? And are there any good deals?

My cheapo blender self destructed after less than 2 years, so I think I want to upgrade to one that will last and is more versatile. I've read a lot about the Vitamix but am so confused. Which one do you recommend and why? We make smoothies and eat a lot of soups and vegan dishes. Can the Vitamix mix cookie dough or bread dough?

Also, is anyone aware of any upcoming sales?
Getting late here now, but I'll be back in the morning. Thanks so much.