Guittard Mini Semi-sweet
We purchase these chocolate chips because they are dairy-free, and mini dairy-free chocolate chips are hard to find in the store. Their price isn't too much higher than a bag of typical chocolate chips from the super market (remember that those bags are only 12 oz., not 16, so figure your comparison numbers accordingly). As a nice side benefit, Guittard chocolate is wonderful. :-) They also have great milk chocolate, but of course, that's not dairy free!
The only drawback is that this chocolate does not have several months' worth of shelf life. Eventually, it's going to get that whitish look to it and not taste quite as fresh (but still taste "good."). Just use it faster! Or use it primarily for baking since you don't really notice the change in quality. Guittard's recommendation is that you don't refrigerate or freeze the chocolate, and I would agree to that.
Pros:Wonderful taste, happens to be dairy-free.
Cons:It'd be nice if the shelf life were longer.