Canon Elph Camera Best Buy

Graduation to a Digital SLR Camera from Point-n-Click. Which Digital SLR Camera is a good buy?
I love my current Canon SD 880IS Digital Elph. For $300, it takes outstanding quality at 10 megapixel and I’m totally happy with it.
However, my plan has been as follows: I plan that my next camera will be a Digital SLR, not Point-n-Click. As a Mac user, I want to maximize the quality of my images for fun and clarity. I plan to buy a digital SLR in 1-2 years, unless something comes up, like free SLR via credit card points that I’m not using, etc.
THE QUESTION: Which company is best to go with? Cannon? Nikon? Any others? Furthermore, which model? I don’t want to spend more than $1,500 or so worth because it would just be a waste since I’m not a pro photographer.
–
UPDATE:
I’m totally with you on that recommendation. I went as far as making a Wish List of everything I’d need. Anything else you’d recommend to start with?
Upgrading from a Canon Digital point-and-shoot.you can’t go wrong with getting the Canon EOS 40D.
-The Screen Size is AWESOME. It’s really big. The only issue is that, when using the viewfinder, my face was hitting the screen. I decided to place a screen protector I had on it.
-Focusing is fast and accurate – I tested this in a relatively low light situation. I was very impressed in random shots and complicated shots where the focus wasn’t evident the steps the camera took to pick an appropriate autofocus.
-Flash is powerful
-The lens included in this kit is wonderful for the many of the reasons listed above – Fast AF and IS (Image Stabilizing).
-The camera is very nice to hold.
-The viewfinder is nice, and gives you all the details you could want regarding your picture.
-The flash is powerful but won’t ‘overblow’ – close flash shots of people’s faces look good.
Overall, I feel I have made a great choice in investing in this camera as I learn more about photography. Luckily, the camera is easy enough to use that one can use it as a very large point-and-shoot, giving me the freedom to take great shots while learning about the more complex details.
Canon EOS 40D 10.1MP Digital SLR Camera with EF 28-135mm f/3.5-5.6 IS USM Standard Zoom Lens
Price: $1,049.95 + $22.95 shipping
reference: http://www.amazon.com/Canon-40D-Digital-28-135mm-Standard/dp/B000V5QV4S/ref=sr_1_13?ie=UTF8&s=photo&qid=1236406743&sr=1-13&tag=commentglitte-20&linkCode=ur2&camp=1789&creative=9325
or
http://buy-cheap-canon.co.cc/canon-eos-40d-with-ef-28-135mm-f35-56-is-usm-standard-zoom-lens/44
Hope that help.