About a year ago our blender died. I always swore I'd buy a Vitamix next. But in the end we didn't have the funds for such a large purchase so I went with something way more powerful than my original blender but not as expensive as a Vitamix: The Ninja Professional Blender.
I couldn't be happier with our purchase. It blends everything I've tried with ease and has a nine-cup capacity. I no longer have to make smoothies in "batches." Although a Vitamix has lots of options and would have been great, the truth is I really mainly use a blender for smoothies, so my Ninja has been perfect for this.
I've missed smoothies, and so have the kids! They are a cool treat in the summer and in the winter help us get our veggies to fight colds and sickness. My boys are terrible vegetable eaters, so also, it makes me feel good to know when we make green smoothies they are getting a powerful helping of spinach or kale--and with no complaints!