I have been preparing to do weddings and have several booked in 2008. I have done 5 so far as "practice" weddings now I'm ready to make it a business. Right now I have a Nikon D80 with a 18-135mm lens. I am planning getting an additional Nikon D80 as a backup body and a 50mm lens for indoor use. Would you get a Nikon 50mm 1.8 or should I go lower? I know it's more of an investment but I'm sure it will payout over time and result in much stronger photos. Your opinions are appreciated!