I agree with the suggestion that you start shooting in RAW. The control you have over your image file after the fact is second to none. As you learn to use the camera, you can also learn to process the RAW files.
Additionally, you mentioned that you are using Apple Aperture. That's a fantastic program (although I am partial to Adobe Lightroom), but maybe a little much at first? I don't know what your experience level is, so I don't mean to talk down to you (if you take it that way). DPP (Canon's software that comes with the camera) may be a good starting point if you find Aperture a little too overwhelming.
Don't get frustrated, which is bound to happen, with the camera, the software, and this Site. There are plenty of people here with many different levels of experience (mine: amateur at best) that are more than willing to help with all three.
Welcome aboard, and good luck! Oh, and welcome to the end of your budget as you know it!