Band kits are most popular of Guitar Hero: World Tour offerings
Gamasutra has figured out the sales of all three versions of Guitar Hero: World Tour, namely the standalone game, the complete bundle and the guitar bundle.
From October 2008 to January 2009, the full band kit was purchased by 41 percent of buyers, the guitar bundle by 35 percent, and the standalone game by 24 percent.
Breaking the three offerings down by sales during the same time-frame, the full band kit raked in 61 percent of the profits, while the guitar bundle earned 27 percent and the standalone version pulled in 11 percent.
Full break down is through the link.