Gettin new glass

[McQueen278]

I'm picking up a 17-40mm f/4L and a 70-200mm f/2.8 IS USM. Who has these and how do you like them? I understand that the 17-40 is very sharp and has good contrast on the wide end, has anyone ever found it truly lacking at the narrow end? How is the 70-200 at 2.8, how much better is it at 4 than 2.8? How happy have you been overall with either lens? Any problems with them ever?

 

[McQueen278]

Nobody has or has used either of these lenses?

 

[Overread]

Most lenses don't perform their sharpest when fully open - stopped down once or twice they tend to show sharper results.
I am in a similar boat with refrence to nearly owning the 70-200m
Lost Prophet uses the 70-200mm f2.8 IS L USM if you are after some shots:
here are some I found where he also uses the lens with the teleconverters as well - to good effect (which shows the overall high quality of the lens)
http://thephotoforum.com/forum/showthread.php?t=103319

Overall I think you will be happy with the results of L lenses - have fun with your first L glass!