I'm not really crunching the numbers as much as watching everything. Since our government made unit pricing at supermarkets mandatory, (i.e. store must show price per 100g, price per kilo etc) we don't really have to number crunch because we can instantly see which like items are cheaper. Half the time I can't remember my name but I have a good memory for figures so when I see a figure at one store I usually remember what it was at another store.
Forums in this country reflect your thoughts, Aldi Dark chocolate is good, but less so their standard range. I'm not really that much of a connoisseur so I can eat most chocolate, even dog chocolates :P, but I do agree that Aldi's standard range is cheap for a reason.
Hmmm speaking of which I wonder where my wife has hidden the latest batch, I could do with some now.