i'm in a dilemma, i don't know which camera to buy. should i buy a canon rebel xsi(450d) with 18-55mm lens or should i buy nikon d80 with 28-80mm lens? the rebel will cost me 450 and the d80 for 440. both will be brand new and come with tripod, bag, sd card, sd card reader, and a cleaning kit. pros and con would be nice. thank you.