I also agree that the 17-55 f/2.8 is a much better walk around lens than the 17-40 for his XTi.
Tell your husband to get off the internet and get a life. "L" is just a Canon marketing gimmick that he has bought into, probably from internet apostles, without considering whether it is better for his needs.
"L" isn't a marketing gimmick. If you take any of Canon's NON-L lenses and compared them side by side to the "L" counterpart you can surely see a difference in quality. Now, when GM put Cadilac badges and labels on the Chevy Cavalier and called it the Cimarron...
Maybe image quality can be close, but build quality is never close. Take the 28-105mm F/3.5-4.5 and compare it to either the 24-70mm L f/2.8 or the 24-105mm and compare them side by side. All three lenses produce nice images, and I actually have the 28-105mm lens. I really like the lens. It isn't an "L" but the images it is capable of are just great. However, I'd be full of crap if I tried to say it was even remotely close in quality to the two "L" lenses I mentioned. It really is not.




