Hi,
I currently have an XTI and plan to getting a 50D soon. In my lens collection, my main two lenses are Canon 17-55 2.8 IS, and Sigma 55-70. I have been thinking about getting an all-around lens when I get 50D. Since I am getting a new lens, I will have limited budget for a new lens. Would you guys recommend Sigma 18-200mm lens? If not any other decent (inexpensive) long lens?
Thanks.




, now have 400do;500f4is,600f4 
