The jack is standard for mp3 players (3.5mm?) You can get an adapter to take it to 1/4" from Radio SHack for a few dollars.
Bass is much better than the small foam units and most of the less expensive in-ear units. Not as good as some of the mid priced larger over the ear units but these are great for noise reduction-
Sorry but probably a no for Canada. Customs forms and higher shipping are a hassle.
usually on international shipping,if you contact that countries postal service,you can get a duty free waiver as long as its not food ,chemical or contraband