Great review and follow-up pictures and comments here Dustin. This lens is next on my wish list (to replace my 24-105). I would love to have the Canon 24-70 2.8 II, but I would need to save considerably longer for that and would give up image stabilization.
Awesome landscapes by the way. I shot some of these same places in DC, but my shots are not as well conceived or composed. You have an excellent photographers eye, something I'm still trying to develop.