Yeah, I'm generally with Lizzie on this one, too. Special K is kind of a nutritional wasteland, even if it is fairly low in calories. The high protein stuff is a little better, but there are better ways to get nutrition, IMO. And better ways to eat for life.
I avoid HFCS as well as processed foods to the greatest extent possible. Of course, completely avoiding them is impossible; I have made my own bread and granola and granola bars, but I don't have the time to do that on a regular basis; don't make my own pasta, etc. But I try to eat and cook with stuff as simply as possible, and buy stuff with as few ingredients as possible.
I do like Grape Nuts, though. I don't eat them often, but I do like them in warmed with milk or even with applesauce!
The Great Grape Nut Debate; I love it!
And now that you don't have to be perfect, you can be good.