I have a nikon d40, along with my 2 lenses, a flash (which will be purchased very soon) and a tripod.....i will be leaving for a month trip in europe and do NOT want to lug around my camera back pack! i want my camera and one good, all around "travel lens"....since my camera will only AF with AF-S lenses, which lenses should i be looking into? i like the zoom of my 55-200, but dont want to be swapping it with another lens (my 18-55 kit lens). i know there is an 18-200, but that lens is $100 more than i paid for the camera kit itself! i was reading up on the 18-105, 18-135 but i havent read anything good (mainly by ken rockwell) suggestions?