In a development that can only be described as earth-shattering, my wife basically gave me the go-ahead to buy a new lens for my Rebel XS.


That being said, I do quite a bit of indoor shooting of my kids. I currently have the 50mm f/1.4 and spend a lot of time shooting at f/2.8 and ISO 1600 due to the lighting in my house.


So, in looking at Bryan's lens recommendations, he has the EF-S 17-55mm f/2.8 IS USM
at the top. I guess I was under the impression that the L-series is superior in image quality. Looking at the first L-series recommendations, there is the EF 24-105mm f/4 L IS USM and the EF 24-70mm f/2.8 L USM. I don't really care about the focal lengths, but the f/4 vs. f/2.8 is important to me. However, will I lose image quality by giving up the IS feature?


I know a little confusing, but which lens sounds like the right one for me?