I think the question in UWA really boils down to your purpose. If you are wanting dramatic portrait or wedding shots (and thus might be making money with it), I would recommend the 16-35II. If you are going to be stopping down a lot and shooting landscapes, then the 17-40L will work just as well. From f/8 on the 17-40L is a very strong lens. Great color rendition and renders distant details exceptionally well. It also handles flare very well and has less distortion than, say, the 24-105L.
Great pictures Dustin! I like the third one the best. As far as the first one goes, I personally find the sky too blue. In Lightroom 4, the vibrance slider is very aggressive on blues and turning it up to make the yellows, oranges, and reds pop, can often result in this effect. Just a personal preference though I guess.
It is a matter of preference, for sure, but fortunately these days in Lightroom you can control saturation and luminosity on the individual color channels. It gives you a lot more processing flexibility without leaving LR
Definitely, I am just used to seeing people adjust the vibrance slider and never touch the HSL individual color channels. Since vibrance adjust the least saturated colors, it is often overdone and the effect is apparent in the transitions of colors (it looks very harsh). This is more of a generalization about LR4 edited photos. Your pictures definitely looked balanced and not overdone in terms of color management though. Keep doing what your doing!