driving home last night, my windshield was hit by a rock in the middle and developed a crack from the bottom up.. it started out as one straight 3 inch crack but by the time i got home it became an upside down "j" about 6 inces now and growing "sigh".. anybody now how much an oem glass costs? or should i go aftermarket? or should i just have it repaired, is it repairable? going aftermarket will not have the water repellant feature the oem has... help...