Which name is better: Dru or Dallas?

Which name do you like better, Dru or Dallas? I've been wanting to change my name to something that starts with a D (Dad's name is Drew, brothers name is Devon) because I absolutely hate my real name! It's ugly. So, just to get a second opinion, what name do you like better? Middle name suggestions are cool too, although I think I'm going to let my mom pick that, since she's kind of mad I want to change it so badly xD Oh, and my last name is Williams.