The great old Neptune Theatre has been reborn as a live performance venue of to-be-determined quality, but tonight's bill is top-notch. Opening the show: New Jersey's Titus Andronicus, whose heady ambition and ramshackle attack recall the Replacements without falling into any kind of pigeonhole. Headlining: Austin's Okkervil River, the well-respected melodic folk rockers who'll have their work cut out for them following the explosive clamor of their supporting band. (Neptune Theatre, 1303 NE 45th St, www.stgpresents .org, 9 pm, $20 adv/$22 DOS, balcony all ages/floor 21+)