Hi Jfacker,
The lesser expensive power cords you mentioned are good however they will not give you the bass extension you desire. To achieve that I personally recommend the BMI Whale Elite that can be purchased on this site. For the purchase price (depending on length needed) you will be getting a power cord equalivant to other manufactures $1000-$2000 power cords, for a fraction of the cost.
I also recommend if you have not done so yet run one or more 20 amp dedicated lines using #10 wire this should also help GREATLY!
The lesser expensive power cords you mentioned are good however they will not give you the bass extension you desire. To achieve that I personally recommend the BMI Whale Elite that can be purchased on this site. For the purchase price (depending on length needed) you will be getting a power cord equalivant to other manufactures $1000-$2000 power cords, for a fraction of the cost.
I also recommend if you have not done so yet run one or more 20 amp dedicated lines using #10 wire this should also help GREATLY!