Best for Least: Power strip, what's best?

What do you use in terms of power strips or outlets that are both inexpensive, (< $200), and actually improve things audibly? Audible improvements can be subtractive it needs not be current in your system, but does need to be available for purchase. If used with an upgrade cord please state which one.

IN short "Who makes the best strip, for the least amount of money?" (Digital, or analog gear or both though Digital is my current main concern)

Thanks a bunch.