Upgrading power cables


Recently auditioned some power cables in an A-B test and became a believer in the benefits of a quality power cable. Since the test was only done with an amp. I wonder if it is necessary to upgrade the power cables of all my components (solid state amp, tube preamp, SACD player). If so, should all components have the same model of power cable? What should be the first component to upgrade?

Thanks for the help.
treadman
Ha!  It will be another whole thread to cover a power conditioner. 

At least your significant other is a real keeper :)
treadman,
welcome! to the wild and crazy world of power cords!
The pre-amp is the heart of any system, so, start here. Take your time
and listen, listen, listen to the various PC out there! Happy Listening.
I use a dedicated water line to the ice maker in my refrigerator, so the dedicated AC line thing does make sense.
A little update on power cable upgrade.
I picked up two SignalCable MagicPower power cords, one for amp, other for preamp. Many Audiogoners have favorable comments on them so I thought it would be an inexpensive way to start. Have had them cooking for a week now, about 6 hours a day, with a fan and a plasma TV. Hopefully they'll make my Spendors sing!