Wii Warm Up: Guitar Super Hero

Logitech and Activision announced that "premium" Guitar Hero: World Tourinstruments were on the way yesterday. We have yet to see or hear any real details about the items, so we don't know exactly in which ways or to what degree they'll be enhanced versus their standard RedOctane counterparts.

In the meantime, we'd like to ask what kind of "premium" features you would want out of guitar and drum controllers? More accurate size? Higher-quality materials? Real wood guitars? Mother-of-pearl dragon inlays? Also, how "premium" do you want these to go? How much are you willing to pay for a high-end guitar controller?