I'm planning to backpack through China for 3-4 months starting in February. I was originally going to stick with a small P&S like a Canon SD1100 but I realized that I really want to capture better images (quality!). I backpacked through SE Asia for 2.5 months a few years ago with a SD450 for reference. The pictures were great, but I want more! I was thinking of purchasing the following: -Canon XSI -Canon EF-S 10-22mm (only lens) - memory cards, bag, filters, etc For the most part though, I want to use only 1 lens. Is this a BAD idea? I don't want to carry too much and would rather enjoy my trip, so I'm willing to compromise. Should I at least purchase a Tamron AF 28-75mm to complement it? Most of my photos are going to be landscape, buildings, lots of people, indoors, streets, etc. Any suggestions would be appreciated.