Always when I edit a photo taken with the Canon 70-200mm F2.8 lens, I just cant believe how sharp it it. Al my other lenses are sharp, but this one is just crazy sharp. But I’m not complaining :) It just could be a little lighter. The first year I had that lens, I almost never used it, as I never had it with me. But now I take it every time.
Btw. how about a little editing tip :) It easily can happen, that when you use Photoengine or Photomatix, your results look less realistic. It’s very dependent on the settings you use, but the biggest reason for this is, that the light distribution is not as it should be. The results have usually everything in the same level of brightness. It just isn’t like that in reality. But there is a simple way you can make it much better. Just take the HDR result from Photoengine/Photomatix and load it into Photoshop with the original 0EV photo in separate layers. Put the original on top of the HDR and set it to 20-40% opacity. And that’s all. This will darker the areas that should be dark, and brighten the areas that should be bright. The effect is subtle, but the photo looks much more realistic after that.