Hi Megan
While a DSLR is always the ideal - a prosumer camera is often a better choice if your knowledge of photography, ready cash and time is limited.
I had a quick look at the specs of both cameras and they compare pretty favourably. though each as some features that may be a decider depending on what you will be using the camera most for. If for example you do a lot of macro then the Super Macro Focus on the Canon would be a big advantage, same with if you take a lot of action shots - the Canon has a slightly better shutter speed range. Another advantage of sticking with the Canon as a brand is that you are already familiar with the menu set ups etc that are very similar between models but not between brands so you have a head start so to speak.
We have a small article here you may want to read and the link below it is worth reading to
http://scrapbook-bytes.com/cgi-scrip...icle_323.shtml
HTH