As I said Weddings are not an on the whim type thing. I walk out of the house with more in lenses than your budget amount. Then there are the two bodies that I carry one being a D90 which will preform just fine for weddings provided your wife knows her camera as well as it looks like on your Fb page. Then there is the three hit shoe flashes and tripod and long long list of other accessories. As Tired iron said weddings are one of the few shooting events that are taken seriously and can not be reshot. Personally I would spend the money on flashes and some of the other essentials first than put the money aside and upgrade your body.