what channels are you looking for? if they are c-band you would need a large dish (4' or bigger & 4 may be too small so don't quote me on that) and ku would require a smaller (minimum 30" dish). I am in the south so I can't speak to channel availibility but i would think that you would be able to get any free to air channels in Ontario
Are you trying to watch worlddirect channels from Directv? You must be trying to watch asian channels from Directv? Most of the KU transponders are leased to Directv.