Wow, thank you all for the input! I know that some of you think the 50mm FL is boring, but I think that if I only wanted to carry around 1 prime, it'd be a 50. I consider it a "compromise" FL... not too long for environment shots, but not too wide for portraits. If I want to carry 1 prime, this would be it.
Dawei: I am amazed by that picture you posted! My 50/1.8 is not anywhere near that level of sharpness. Even manually focused using 10x live view, I cannot get sharp pictures wide open.
Michael49: Yep, I saw that link before. That guy's tests seem to be in favor of the Sigma over the Canon L. But I wasn't sure since he owns the Sigma. Some people seem to favor their own equipment in their reviews. I wanted more opinions, hence I asked the question here.
I have decided to dip into my savings and buy the Sigma now. I was going to wait, but I figure I might as well buy it now. I might miss some great opportunities (photography wise) if I wait.
Thanks again for all the input! And please wish me luck in getting a good copy!