Dinosaur Jr. getting its original line-up back together in 2005, after years of acrimony between frontman J. Mascis and bassist Lou Barlow (and to a lesser degree, drummer Murph)? Shocking! Dinosaur Jr. forgoing the “temporary” tag affixed to so many other alt-rock reunions of late, and remaining fully active four years later? Surprising! Dinosaur Jr. putting out two studio albums – 2007’s Beyond and the just-released Farm – that not only hold their own against the holy trinity of 1985’s Dinosaur, 1987’s You’re Living All Over Me, and 1988’s Bug, but in more than a few moments are actually better than those recordings? Completely fucking stunning! Other than maybe Mission of Burma, Dino Jr.’s got to be the most satisfying and fruitful of all these recent reunions: Guitar god Mascis continues to bring the fury, and the trio’s undeniable chemistry – despite whatever rancor there’s been over the years – comes through in their sterling songwriting efforts and fervid live performances. Who knows, though: It could all blow up again, so I’d relish every chance to see ’em, especially since they’re at the top of their game right now. With Viva Voce, Cymbals Eat Guitars, Japandroids, Born Anchors, Champagne Champagne.

Sat., Aug. 8, 2 p.m., 2009