get the dual 4ohm ones even though you could run that amp at a half ohm but you dont need that much power. good solid amp and it makes great power too.
You must excuse smoker...he never reads subject lines.....
I would go with the dual 2 ohm ones. If you are running 2 you can run them in parallel/series combination wired to 2 ohms and get 550 to each sub. As long as you set your gains right, you should have no problem sending each one 550 watts.