Hi TS,
I believe that this is a topic asked generally. As Akatsuki mentioned, it is a system that you are buying into. So the cost of switching to another system can be quite painful to your wallet if you decide to switch later on.
Perhaps before all the brand comparisons come to mind, you might like to go to a camera store to play with a particular system eg Canon. If the camera doesn't feel natural in your hand, then no matter how good it is, I might think you might not want to buy it.
Check out those within your budget. You may wish to consider getting a second hand camera as the others before have recommended. That way, your budget might be able to cover the cost of other accessories or lenses. It doesn't mean that you need to start off with a cutting edge camera to enjoy the hobby. A 40D/50D/D90 may also be well worth it since you are still exploring.
I personally made the error of listening to a friend which camera was better instead of learning and making a more informed decision. I could have bought a cheaper body and a better lens previously. You may decide that you want to buy a canon but may end up buying a Nikon/ Sony/Olympus because it suits your needs and budget more.
