What's the Best Ice Cream Shop in Dallas?

In case you haven't noticed, the temperature has gone from pleasantly toasty to nauseatingly hot — it's that time of year when ice cream, snow cones and cold beer all become basically their own food groups. With that in mind, we'd like to pose a very important question: Who has the best ice cream in Dallas? (There's an option to write in your own choice, but please don't say Pinkberry. That's just wrong.)