Like to find out from Pentax users what is the best fast zoom for use with a Kx? I am planning to get a Kx and was originally thinking of using a 35/2, but figured out that there will be the occasions when the zoom will be needed. I don't plan to keep either the lens or the camera when I am back as my preference will be to get the K7 replacement and the DA limited lenses, as such will be selling these off.