Not sure about what power cord is best..as that doesn't exist IMHO. If you're looking for a good heavy duty power cord, how about some Volex 14 gauge power cords. Go to page 7. The model numbers are 17604/C3-25/10 for the 2 meter( $6.28 Each when you buy two) and 17605/B1-50/10 for the 3 meter($8.90 Each when you buy two). These should be sufficient for your needs.
Good listening
Good listening