Photo by Michael Alan GoldbergTwo young blondes with toothy smiles and hard-core work ethics, Taylor Swift and Carrie Underwood, helped country expand its fan base in these years of shrinking music sales. Meanwhile, Kenny Chesney, Rascal Flatts, Alan Jackson, Toby Keith, Tim McGraw, Brad Paisley and George Strait kept filling arenas and at least maintaining their popularity on the road, if not with record sales. But as has often been the case, the best country music has little to do with what's