As the latest venture from part of the team behind the late, great speaker and video dock manufacturer Sonic Impact, BigR Audio's new line of "reference headphones" ($149 each) has been built from the start to capitalize on recent trends in co-branding and fashionable design. The huge -- seriously huge -- headphones look and feel inspired by the plasticy, sorta edgy Skullcandy style, with a female-friendly Hellz-branded version (XL-HB1) that comes…