@Northstar - not sure I agree with the "little bit of punch" and certainly don't intend any disrespect but it appears the overall color and more notably the feathers have been altered with an unnatural purplish hue. BirdseEye for the iPhone is currently housing over 100 of my images as well as the Mitch Waite group on their upcoming release of iBird Pro. Bird accuracy and their display is paramount as they are reference points for the 1000's of birders using these apps as field guides (I realize that is not the case here but the OP is aiming for wildlife photography). Many birds have similar overlaps such as the Townsend's Warbler, Hermit Warbler and the Black-throated Green Warbler. Enhancing color or saturation as an example could easily portray an incorrect species.
The bird at hand in the first 3 photos is a Tufted Titmouse should that help any and can be researched further here: http://identify.whatbird.com/obj/676/overview/Tufted_Titmouse.aspx (wish we had them here - we've only the Oak Titmouse (similar) and their call is excellent.
Personally, I enjoyed the Tufted Titmouse originals the way they are (display of accuracy and lighting is evenly balanced) and agree with the other poster on the Rebel as with most cropped sensors including the 7D image degradation sets in beyond ISO 800.
Rev, I defer to your expertise regarding the color accuracy. You definitely know about a 1000 times more than I do about birds, and I've admired many of your bird images.
1dX and 5d3... 24-70 2.8ii, 70-200 2.8ii, 1.4x and 2xiii, 85 1.8, 40 2.8, 300 2.8Lis