Sorry, this is incorrect. While Blue Bell is competent, they kind of do "just enough" to make decent ice cream. It's good, but nothing memorable.
The best store bought ice cream (as has been mentioned here before) is Graeters. It's expensive (1 pt will run you around $5), but WHOLE-EEE CRAP is it an experience!
They only make two gallons of the stuff at a time, and they use the best ingredients available in every batch. The vanilla chocolate chip is my favorite because it always has a giant chocolate nugget in the center of the container
Many stores carry it, but the problem is since it's so expensive, it sometimes sits in their freezers too long and gets freezer burned, so be careful it's fresh (stores like Kroger do mandatory stock rotation, so it's safer buying it there if you have one available).
The stuff is so good that celebs actually have it flown in from around the world (ah, to be rich).