The Cowboys wrested the title of the NFL's most valuable franchise from the rival Redskins, knocking Washington off the top of the list for the first time in eight years, according to Forbes magazine's annual survey. Thanks to a new $1 billion stadium set to open in 2009, the Cowboys' value increased by 28 percent -- by far the largest jump among NFL teams this year -- to $1.5 billion. They climbed from third to first in the rankings, leapfrogging the Redskins ($1.467 billion) and the Patriots ($1.199 billion).