Alonski,
Dedicated lines are cheap to install, maybe a couple hundred dollars, way less than a power cord, and you can never have too much power to your rig! I say add the line and see, then play with the cords as you'll know the incoming power is the best you can get and therefore will be best able to tell what the power cords do to your system.
This is what I would do and I think it is the cheapest next move for you!
Dedicated lines are cheap to install, maybe a couple hundred dollars, way less than a power cord, and you can never have too much power to your rig! I say add the line and see, then play with the cords as you'll know the incoming power is the best you can get and therefore will be best able to tell what the power cords do to your system.
This is what I would do and I think it is the cheapest next move for you!