I've also considered getting a gun licenses just to get a legal gun. The gun course with the RCMP is around 12 hours long (usually broken up between two days) and then they need to do a criminal record check, but other than that the process is apparently fairly easy. I never got around to it because I got busy with other stuff, you'll need to put aside at least a month or two to get all your paper work in order and apply, and then wait to see their response.
As for which gun, any real gun will work. If possible, get a shotgun instead of a rifle. Shotguns are also legal in Canada and I remember reading here that they are more reliable, I believe the reasoning was because the spread shot can help reduce the chance of you missing the brain stem.