Some years ago I got a bunch of high end Furutech cable stuff from work...I made speaker cables and interconnects that made a HUGE difference in my stereo; I also got a Furutech wall outlet and power cable parts...the outlet was amazing in how well it was made; imagine all your wiring done by Ferrari, quality beyond...thing is, I don't think you improve anything in the power section unless you go this far back, so spend the money on interconnects and speaker cables...I know they make a difference..

Remember that the power behind the wall was installed by an apprentice using the cheapest components available, and he/she was probably hung-over at the time.
 
John