I believe, all models come with the wet container and you can purchase a dry container separately.
I love, love my vitamix and like another poster mentioned, regret waiting years to purchase one because of the price$$$. I do/did have a Ninja, but the blades were a worry and it didn't work as well for smoothies; I'm picky with textures. jmo, ymmv Ninja lovers. I gladly donated my Ninja a few weeks ago, but wish I'd purchased the Vitamin instead. To be honest, I did not spend the dollars on the Vitamin, dh did for our anniversary and it's one of my favorite gifts ever.
Cleaning the Vitamix one of my favorite things...Just rinse and water and soap and pop it back on the stand and let it clean itself and then rinse. It doesn't add dishes to my dishwasher and I love that it's clean and ready to go in under a minute. Like I said, mine sits on the counter and I use it everyday for smoothies to get my veggies and fruits.
Wanted to add, we purchased from QVC on a rec from a friend. I was able to use it for a month with the option of returning it minus shipping. Dh said to get and I could make up my mind and quit wondering about it with out the guilt of wasting money. If you know someone who owns one, ask to try it out first.