By Denny Dyroff, Entertainment Editor, The Times Allegaeon Whenever Allegaeon comes to the area for a show, metal music fans get excited. Allegaeon plays a smorgasbord of metal music that rattles the rafters and usually tours on a bill with several top-flight metal acts. When Allegaeon played the Voltage Lounge last year, the band was on a bill that included Rings of Saturn, Entheos, Neckrogoblikon,...