Yes, you can mod the pump to be an 18W but it might be a tad louder than your expecting due to it being effectually, hard mounted. Any of the rads mentioned later should produce rather decent results with even the 10W version DDC. As for the rads, PA, BIGTX or Fester will serve you well for the big boys, Medium thickness rads you have either Swiftech or XSPC and if you need to go thin, go with a BIPro. Just steer clear of the GTS as they are overly restrictive for both the water and airflow.
