Amazon (Canada) has an E3 pre-order sale going until the 18th. Best Buy (Canada) also has one, but the Amazon deal is better if you order more than 3 titles.
Order 2, save 20%. Order 3 or more and save 30%.
http://www.amazon.ca/b/ref=amb_link_...f_rd_i=3198031
mid as well get them for a discount if you're planning on buying anything day 1, especially since prices in Canada keep climbing.