Neither because you aren't making money off it yet. If you are doing weddings you need 2 bodies and for the price of a 1D3 you can get 2 60d new in Toronto at Aden. And if I were you and sports is really important I think a 7D suits you better than popping for a 1D3 now.
Also, as usual when someone say they want to shoot a lot of this and that and sounding like a bright eyed new photographer I always search their posts. 4 days ago you posted your first, on POTN, 2 shots for people to critique. I am not sure how much time you have had to use your gear but everyone in Toronto who has a DSLR seems to think they can be a wedding photographer. Do a quick google search and you'll be overwhelmed at the endless websites of people who are trying to make it as professional photographers.
Now that being said here's why I think you should think 60D or 7D.
Cost is lower even if you get the 1D3 used. You can use that for other things. You have 1 flash right now it's likely if you do any weddings you'll want more and light stands, soft boxes, umbrellas etc. All that costs money. Now in your experience you might not think it's needed but my sister hired a photo who, in my mind was a complete amateur, who came into the church rocking a 5D classic and a 480EX flash on top. The church had high wood ceilings shaped like the inside of the roof. The photo didn't seem to know how to expose correctly either. End result was a epic fail. The photos from the church were so noisy due to her having to add exposure in post process that the in laws looked like they were 70 years old and every black suit turned into a technicolor noise dream coat. Flip to my photos on the 7D they were clean where I didn't use flash. Where I did I used lighting gear cause I know I cannot bounce flash in that church. They ended up sending my photos to the relatives who cannot make it to the wedding.
In a nut shell wedding photography is expensive in gear investment. Any money you have left can be invested for other stuff you might need for your "business". The 18 mp APS-C sensors that canon has right now is an amazing piece of engineering. It gives you performance similar to what full frame sensors were doing a few years ago. And in the case of the 7D there are technical advances in that camera that canon hasn't put in even the new mk4 (like color sensitive metering).
Also finally, it's bloody hard to make money in Toronto as a photographer. Unless you do it full time and knows how to market yourself. Just putting your website up isn't useful as everyone and their cousin wants to be a photographer in Toronto. Do a google search and you'll be overwhelmed by the number of hits. Everyone thinks they can make money cause the full timers are charging $3000 per wedding. Flip side is there are hundreds of part timers who do it for 1/4 of that price.