LET'S FACE IT. THE MTV VIDEO Music Awards (Wed., Sept. 9, 9 P.M. ET) has become the only TV music awards ceremony that matters. Not the statuette itself—the Grammy still carries more prestige—but as a place to see and be seen, this is it. Consider the lineup of live performers at UCLA's Pauley Pavilion: Eric Clapton, Nirvana, Pearl Jam, the Red Hot Chili Peppers, Bobby Brown, Def Leppard, the Black Crowes, Guns N' Roses, Bryan Adams and En Vogue. Have mercy. You even get U2 live via satellite. This year's show should also be improved by the appointment of Saturday Night Live's Dana Carvey as host. Not that Arsenio Hall didn't give it a revved-up college try for four years. The A man is a good cheerleader, but he's just not the rock and roll type. Let's face it, last year he introduced Queensrÿche's hit "Silent Lucidity" as "Silence, Lucy."