Gang, I've been asked to shoot a 25th wedding anniversary party that will be held outdoors. I'm quite comfortable with my Nikon D300 and have come to rely almost entirely on the 18-200mm VR lense that has proven to be effective for my needs (zoos, travel, family portraits) mainly because of its versatility and the convenience of leaving the lense mounted. I can certainly appreciate that this particular lense is "general purpose"; it does a number of jobs admirably, but specific lenses would presumably do individual jobs more precisely. In order to ensure the best possible results, I'm planning to schedule a "portait session" and also shoot "spontaneous" images during the party. My question becomes: What lenses (or other equipment) would you recommend? Thanks in advance.