REL Subs: have you changed the stock cables?

Hi,

I recently got a REL Strata III. Has anyone changed the cables; speaker wires and power cord ontheir REL sub. What did you change it with and was the change an imporvement?

I spoke to a REl dealer and he mentioned that there really was no need to change the cables since they were really made to bring out the best in the REL.

I am thinking of changing my PC and wires but did not know if it wuld make a difference.

Thanks for the input.