I hope FS has enough 3ds xls to meet the demand. Between Red Flag, cheap ass and here there are a lot of people doing this deal. Get there early and do an instore pickup if you can.
Dundas, being the flag ship store, will almost always have stock way over what they need. They have literally towers of 3DS systems at the launch in March 2011. I doubt it'll be a problem for downtown Toronto at least.