Far from being one of the ''weakest'' shows to win Best Musical, ''Memphis'' (I'd argue) is one of the best and most crowd-pleasing ones of its season. It won the trifecta of Best Musical from the Outer Critics Circle, Drama Desk Awards and the Tony Awards. It ran for about 1,200 performances at the Shubert, easily outlasting any of its fellow Best Musical nominees: ''American Idiot'' (448 performances); ''Fela!'' (497) and ''Million Dollar Quartet'' (489). ''Memphis'' was a hit in London, winning a couple of Olivier Awards, and its original Broadway cast, starring Chad Kimball and Montego Glover, was filmed in HDTV for movie theaters while the show was still running in N.Y. After it aired as part of PBS' ''Great Performances,'' ''Memphis'' picked up an Emmy, too.