Guided by Voices – La La Land (Guided by Voices, Inc.)   A colleague recently quipped that “it is a new fiscal quarter, so there must be another Guided by Voices album coming out.” Indeed, Robert Pollard and company (a rotating list of musicians) are prolific almost beyond measure, a situation in which one might wonder about issues of quantity versus quality: they needn’t worry.    Joining Pollard on La La Land are a slate of long time collaborators: Doug Gillard and Bobby Bare, Jr., guitars, Marc Shue, bass, and Kevin March, drums. They know Pollard’s style thoroughly; even in