Here is an incredible price on one of my favorite tires
Continental Grand Prix GT Folding Tyre Twinpack - Folding Tyres - Ribble Cycles They are 25s but measure over 28 on my Pacenti 23mm wide rims. Usually they are a good buy at about $30 something, same as the GP4000sII. IME they ride similarly but are less prone to cuts, my gripe with the GP4000sII.