ProgPower USA
Artist with the following albums: "ProgPower USA 10 Sampler disc1", "ProgPower USA 10 Sampler disc 2", "ProgPower USA 11 Sampler disc1", etc...

ProgPower USA 15
Artist with the following albums: "CD Sampler - Disc 2", "CD Sampler Disc 1"

ProgPower USA Sampler
Artist with "Disc 1" album

ProgPower USA VII
Artist with "2006 Showcase Sampler Disc 2" album

ProgPower USA XVI Sampler
Artist with "Disc 2" album

ProgPowerUSA VI
Artist with the following albums: "ShowCase Sampler disc 3", "ShowCase Sampler disc 2", "ShowCase Sampler"