I agree with ZenSilk, but add Sinbad to the choices.
Fantasia has a few really good flavors and some real bad ones too, so choose carefully. Pink Lemonade, Blueberry, Orange Sherbert and Pumpkin Spice are tasty. Wild Mango smelled like B.O. (body odor not Barack Obama) tasted funky even after allowing ot to air out, Peach Fuzzy Navel, and Sweet Red Melon are way too weak flavored to recommend.
Starbuzz has several solid flavors. Citrus Mist, Blue Mist, Pumpkin Pie, Christmas Mix, White Peach and Safari Melon Dew are all really good.
Sinbad is cheaper than Starbuzz and of comparable quality. Try Fuzzy Melon (peach melon combo), Garden of Eden, Raspberry Splash, and mandarin orange are very good.