I despise both Dasani and Aquafina. They're just Coke and Pepsi without the syrup! They're made by the same people. Back when I used to work at a gas station, it used to always amuse me we would be run a special on the liter bottles of Coke and Pepsi so that they were cheaper than Dasani and Aquafina. People would still by the bottled water. I know they're different products altogether but it just seems silly to me.
Personally, I only drink bottled water that states specifically that it's spring water. I mean, what's the point in buying distilled water? I can get that from the faucet with a sheet of cheese cloth and a glass.
My personal preference for bottled water is Evian but that's so expensive that I generally can't rationalize buying it. Consequently, I ususally just drink tap water.