Owners of "Giant Killers"?

We often read of folks who have heard "Giant Killer" products: amps, preamps, digital sources...

We also often read about products that are tried, and are "excellent and worth the audition", but are not chosen for the listeners's system because of a better product.

I'm wondering how many Audiogoners actually own a "Giant Killer"?

Has someone heard a component that offers great value, but beyond the dollar value offers perfomance that has truly been good enough to replace the "Giant"?