Ill keep it simple. Im going to spain for 2 weeks in july. My birthday is coming up in 20 days, it would be a great time to get one more lens in my bag for the trip. At the moment my kit is a 50 1.8, 70-300 4-5.6. I NEED a walk around lens but i also want a telephoto like the 80-200mm 2.8. So i want recommendations for a nice walk around lens. My budget is 850. Im going to spain, i want something for walking around the city. Will be mounted on a D70.