http://www.thefirearmblog.com/blog/2014/09/30/canadian-c7-different-m16/
For the price, I don't think they're worth it for the civilian market. Diemaco says that the bankruptcy of Colt in the US shouldn't affect the Canadian market but I am skeptical.
http://calibremag.ca/home/2014/09/colt-canada-worth-the-wait/ (http://calibremag.ca/home/2014/09/colt-canada-worth-the-wait/)
http://calibremag.ca/home/2015/06/colt-bankruptcy-what-it-means-for-colt-canada/ (http://calibremag.ca/home/2015/06/colt-bankruptcy-what-it-means-for-colt-canada/)