hey guys, ive been into photography for about 3 or 4 months now, and ive been getting pretty good with night photography. I was wonder what your opinions were for a lens for my D60 for low light shots. i use a tripod now and the shutter is very long with my aperture set to 3.5 on my 18-55mm kit lens. i would love the 17-55mm 2.8G or i think it might be the 1.8G; but that lens is $1100. are there any other lenses out there that are just as fast?