The Fit & Active brand at Aldi is excellent. Here are a couple of samples of Fit & Active brand bars that we enjoy. They are comparable to the Special K bars. Except in price of course, they're much cheaper at Aldi!
The Vitality Cereal Bars were $1.79 at Aldi, the Special K bar equivalent is $2.50 at Wegmans. The Protein Meal bars are $3.99 at Aldi and the Special K version is $5.49 at Wegmans. Buying these two items at Aldi will save you $2.21! That's enough to get another box of Cereal bars and still have change leftover.