Big Buns

http://www.eatbigbuns.com/
4401 Wilson Blvd
Arlington VA 22203
(703) 276-3032

The burgers here turned out to be dissapointing.....thin and flavorless. HOWEVER, we are in love with the fresh cut sweet potato fries and the chipotle aioli dipping sauce! Each batch is cooked and seasoned individually. Also, I'm an enormous fan of the mahi mahi in a bowl, with LOTS of fun toppings such as grilled pineapple and mango & bean salsa. I also love how toppings are free. I get a really nice salad out of the "bowl" option for a great price.
The diet coke mix in their fountain soda machine is spot on too.