I chose Canon for my deal, just because Nikon did not have the speed I needed. But if you are talking about just taking photography for hobbies sake, there are very few digital SLRs that you would not be completely satisfied with. Picture quality, longevity and ease of use. I have seen cameras I have never even thought of as being credible cameras take wonderful shots recently. It comes down to preferences, features, feel and most of all price. No real need to get the 1Ds mark III unless you have the 8 grand to spend on a body. The typical print, internet post, etc will never tell the difference. Read the reviews, take them for what they are worth and go for it.
Definitely let us know what you get, and show off some shots when you get things figured out.