Bah... what about Joker, Stewie Drinks (ie: Stewie's Mind Elixer), Full Throtle..

personaly the Stewie drinks offer one hell of a punch. 140mg of caffein in a Red Bull sized can. After that it's all about Joker. Like the taste better than Monster, Full Throtle.

Sugar Free drinks are a joke.. hehe.. seriously.. you're drinking battery acid, and you're biggest concern is the sugar? hehe