With it's focal length at 17mm there wouldn't be much you couldn't cover and f/2.8 aperture its fast and very good in low light. A great walk around lens. I know breh, the price is up there, it's damn near L glass pricing, quality is great.
Only other lens from Canon I can think of is the 28-105mm, this came packaged with a few of their camera bodies, it not as nice as the 17-55mm 2.8, however for a walkaround its more than capable. Not sold new anymore, you should be able to find one used for a very good price.
Canon Zoom Wide Angle-Telephoto EF 28-105mm f/3.5-4.5 II USM
Canon Zoom Wide Angle-Telephoto EF 28-105mm f/3.5-4.5 6469A005
Canon EF 28-105mm f/3.5-4.5 II USM
I will say Tamron and Sigma make excellent lenses as well, especially Tamron's 28-75mm f/2.8.
LensRentals.com - Rent a Tamron 28-75mm f/2.8 XR Di LD for Canon
Tamron 28-75mm f/2.8 Xr Di
Tamron 28-75mm f/2.8 XR Di Autofocus Lens for Canon EOS
Yea, I used LensRentals.com for the last 5 years, I always get the Canon 100-400mm for airshows and race events, hard to beat their service and pricing, never had an issue.