I've been trying out the different bars from the list Jessica posted. The zone bars are pretty good but the Luna bars (around 170 cals, I think some are 180) are awesome, my favorites are chai tea (cinnamony) and toasted nuts and cranberries. They are also all natural. I haven't tried one I haven't liked. I usually have a bar and a Dannon Lite n Fit yogurt or smoothie for breakfast. It's quick and yummy. The powerbar protein plus is chewy and leaves something to be desired.
I LOOOOOOOOOOVE Luna Bars and have one very day! My favorite flavor (currently) is the Orange Bliss, but I also love the Lemon Zest, Keylime Pie, Chocolate Peppermint Stick, Dulce de Leche, and Chocolate Covered Cherry (gee, did I leave one out? LOL) I have yet to try one I haven't liked. So yummy!