xsv is one of my favorite data manipulation tools. Also, the author of that package is one of the best developers I know. I use xsv with tv. I normally pipe the output of xsv to tv.

1. As you noted NA comprehension 2. Column overflow logic for different sized terminals 3. Summary meta data in the header 4. Significant digits logic. This allows users to view more columns than they would otherwise view due to decimal dust shifting the columns over. 5. This is the most import! It looks really pretty!