A split neutral density filter probably would work better. Polarizers work their best when the sun is at your side. With the sun directly in front, the polarizer would darken the entire image by an f-stop or two but the polarizing effect wouldn't be noticeable.
I like Walter's crop of your photo. If you were going for the sun reflection, I think you should have waited another 20 minutes or so and the oranges would start coming into play and the sun wouldn't be so bright.
Another couple things to consider, with the sun that bright, you could damage the sensor in your camera and your eyes. When the sun sets, the brightness drops off rapidly and there is much less danger of eye or camera damage.