OK…user update. I’ve been using the new Gitzo 3540XLS and Gitzo 5540LS for a couple of months is all sorts of nasty environments and this is what I’ve found. They rock (as in they are great)!
The main things I love are all based around their new G Lock technology. The ease of use is outstanding! Juggling the height of the old 1548 with the 600f4 on board got real old, always having to take your eye off the subject to mess with the leg locks. No more, with the 5540LS, I can adjust without looking at which leg lock while I’m grabbing or giggling the leg to get longer. An important side benefit of the G Lock technology is the extra stability while working with a lighter tripod. I’m sold.
Moose’s Camera Bag has been updated with these an other small additions I’ve made so far in 2007. I hope the information helps you make the most of your wildlife photography budget!