The Breathing Color Vibrance Metallic, or the Moab Slickrock, work well for the right images of mine. As others have said, multiple brands of metallic surfaces are more similar than they are different. Normally after mounting I laminate metallic papers with a high gloss laminate to maximize contrast, color and sharpness. While not *serious art* the results are pretty dramatic when applied to the proper image, being displayed in a proper way.
John-