I plan on picking up a XSi camera this weekend and 1 lens.
I have researched these two lenses:
EF 17-40 f/4L USM
EF-S 17-55 f/2.8 IS
From the reviews I have read, both are an excellent choice, but I can't decide. One on one hand the 17-40 is part of the L series but not IS and a f/4L. On the other hand, the 17-55 does have more zoom and IS along with f/2.8. I am leaning more towards the EF-S lens but that L series lens seems to be on the best seller's list.
Which lens and why?
Any input is much appreciated.