Seeing as how Guster’s Joe Pisapia has been here in his studio writing and recording an album with k.d. lang of late — an album that will lead to a tour with a place for him on it — the remaining three Guster guys (Adam Gardner, Ryan Miller and Brian Rosenworcel) have no choice but to carry on without him and take to the road promoting the new Guster album, EasyWonderful, much of which was also recorded in Pisapia’s studio. Filling his shoes on the road is Luke Reynolds, once of Blue Merle. Guster’s first full-length in four years is amiable, well-made power-pop through and through. Take “Do You Love Me”: Miller looks back on 21 — it has, after all, been a decade and a half since the band’s collegiate beginnings — searching for feelings that, instead of jaded, are fresh and strong as they once were. Sorta serious stuff, but it’s also as bouncy and hooky as the best of ’60s AM pop.