I tried a bunch of different Vitamix blenders with probably all containers available on the market. I ended up using 48oz stainless steel container. One reason is that I really don't like how the plastic ones were getting microscratces inside so fast for both aesthetic and health reasons. They are also hard to clean from turmeric for instance. While, steel containers on the contrary, are neutral, can withstand way hotter temperatures and do not scratch or stain.
At the same time, I really liked low profile 64oz container for its incredible performance. It was just better for the purpose of making mid- to large-size batches because of the size of a container and a bigger more powerful blade.
Now ideal for me would be if Vitamix had a similar 64oz stainless steel container. If it's possible from the engineering standpoint, I wonder why they do not produce them?
Please support if you agree. Maybe guys from Vitamix would hear us.
Sidenote: The purpose of this discussion I should mention that I'd rather use a glass container because they are transparent, but I know that the official response from Vitamix is that as of now they cannot engineer a proper glass container that would fit their standards.