Combo's on newegg are a good ideal, but I wouldn't ever get the super combos. I feel they package some low-end items (such as the psu) that doesn't sell on it's own just to get it off the shelves. It's just business, and I would do the same
Where combos are good however, is when you can find a combo that has a cpu and mobo you want. They have all sorts of combos that come out every day.