OK, so I'm in a dilemma that almost all crop-body owners are in. I currently do a lot of bird photography as my main subject and have an XSi but plan on moving to a 7D or something else in the future that would still be cropped as the 1.6 crop is a must for my 100-400L to get decent zoom. However, now I've started to do a lot of landscape photography and after carefully learning the ropes of the DSLR world over the last year (and taking over 16,000 photos and 800gb of hard drive space) has really taught me that I'm becoming limited with my current kit lens (18-55 IS). My main contenders are: 1. 17-55 2. 24-70 3. 24-105 4. 17-40 5. 16-35 After trying out all these lenses at B&H I really enjoy the weight of the heavy L lenses (24-70 and 16-35). I know the most popular (by far) is the 17-55 but I almost always find myself on the wide end of the spectrum and really like "creative" shots (I have a P+S that is portable for vacations and traveling with my wife as I don't like carrying the whole rig around on vacation). Most of my photography is either after work or on weekends when I can really enjoy the hobby and take whatever pictures I want with all the time I want. 24mm (equivalent of 38.4mm) as a baseline seems way too zoomed in for my taste and the 17-55, while very nice optically (according to everyone) just doesn't have that "feel" of a sturdy lens (although it probably is). Is there anyone who shoots with a 16-35mm on a crop body as their primary walk-around lens who can offer any insight?