I discovered some time ago that a bag of chocolate chips was an awesome value. Tasted just as good as bars and so much cheaper per ounce.
I usually get Hershey special dark but might look for an even higher cocoa content. I have heard dark chocolate isn't exactly health food but it isn't bad of a lot of other choice.
The other awesome thing is it is super easy for portion control. You aren't set at a whole candy bar. You can, in the extreme, portion it chip by chip. I usually eat a small/medium handfull slowly. One bag, can't remember if it is 8 or 16 ounce lasts me 2 to 3 weeks.
If you never thought of getting a chip bag for snacking instead of baking why not? Same chocolate at a much better price than bars.