I actually like Ruffles in Sour Cream and Onion and Cheddar Sour Cream flavors. The added strength crinkle-cut/ruffled chips have make it much more common to have whole chips rather than broken fragments.
With dips and whatnot, the best are Ruffles Original as far as I've tried. The extra strength from the ruffled-cut makes it easier to get a good dollop of dip with each scoop =D
As for my favorite dips, Garlic and Spinach dip, Clam dip, and Smoked Salmon dip are my favorites.