Whats a good walk around lens for a 50D

[bobt]

Thanks for your suggestions. I would love to get an L lens but all the camera shops have said don't bother unless you are going to get a full frame Dslr as you would not notice any difference.
Cheers

No offence, but you seem to have found some strange camera shops! I have the 40D and have various lenses including the 24-105L. There is no comparison between the cheaper lenses and the 25-105 - it produces simply stunning images. I have cheaper lenses ranging from the kit lens to mid-price zooms and the 24-105 is simply the best. Granted, you can achieve some great shots with a cheaper lens, but so tell you that there's no difference on a cropped sensor camera is simply bad advice. It's what's in front of the sensor that counts!