If you are worried about pick pocketers go to www.pacsafe.com they have slash proof bags and purses as well as camera straps. Great for guys and gals. I used the citysafe 200 and its great.
For a great view of the city (especially at night) go to the top of the Eiffel Tower at Paris. It also offers a great vantage point for viewing the water show at the Bellagio.
This is a FANTASTIC tour for a city person. The shopping, dining, nightlife, and cultural opportunities are limitless as each city seems to outshine the last.