Lens for a 50D
I'm looking for a lens for a 50D. Which one of these would be the best for the money or I would be most satisfied with? Just general walk around photography.
Sigma 18-200mm f/3.5-6.3 DC OS HSM or Tamron 18-270mm f/3.5-6.3 VC or Canon EF-S 18-200mm F3.5-5.6 IS
Thanks for any replies.