im going to be purchasing the nikon d90 as soon as i figure out this question. the kit it comes with includes the 18-105mm. i want more then that. if i were to purchase the 18-200mm would i never even need to use the 18-105mm. i dont want to get the 18-105mm if im not going to use it after i purchase the 18-200mm. so i guess thats my question. sorry im neeeeeeeeeeeeeeewwwwwwwwwww.