Power Cord

Yes. No. Yes. No. Yes. No. Yes. No. Yes! Mas, papi, mas...que rico, que suave...

Upgrading the power cord can make a big difference, especially if you live in an area with lots of RFI, or in an apartment or older building. I live near the Dulles airport, and it made a big difference in video and sound when I upgraded my DVD player cord. If you want to try a cheap alternative first, try a $25 power wrap from amusicdirect.com. just wrap it around your standard power cord and give it a chance. You can also put it on your receiver, tv, cable/satellite box. If you see a difference you may want to upgrade those components with real power cords. You don't have to spend a lot of upgraded cords, either.
http://www.amusicdirect.com/products/detail.asp?cat=280&sku=AHW02

The same power cord that "gttgroup.com" sells for $49.99/$59.99 can be purchased from Americor for just $2.87.

Do a search at the AA on the "Absolute Power Cord" and see what is being said about this overpriced cord.

I herd the difference when I upgraded my stock cord with a Harmonic Technology. The soundstage deepened and the bass got a little tighter. If you are all finished buying equiptment and you are happy with your purchases (as we all are) start upgrading your cables.

One thing I learned from all this is that YES power cords can make a big difference in some components. However, installing dedicated lines will make a difference in ALL components. For around $200 you may be able to have someone install a couple dedicated lines (separate the amps from the electronics). This was the single most valuable improvement I made to my system, and it cost about the same as one high end power cord.