As frontman/songwriter for the late, great indie rockers the Replacements, Paul Westerberg was anointed the voice of a generation. And while that might look nice on the résumé, it can have its drawbacks; over the course of three solo CDs, Westerberg has struggled to regain the acclaim he once enjoyed. But the fortysomething rocker comes awfully close on his first CD in almost four years. Actually make that two CDs--Stereo consists of two separate projects and as a result showcases distinct aspects of Westerberg"s songwriting skills. The raucous Mono is all spit and fire, and featuring a haphazard sound, finds Westerberg, a.k.a. Grandpaboy, and band tearing through an efficient and often exhilarating set of postpunk rave-ups. The best of the lot is the endearing "Let"s Not Belong," which, with its tale of mismatched--and hence perfect--love, is laced with Westerberg"s trademark tongue-in-cheek, heart-on-sleeve appeal. Stereo, his "solo" CD, is somewhat less rowdy but no less emotionally emphatic. His voice is often raw and sometimes backed only by a plugged-in guitar, but Stereo features insistent love songs (the aching "Don"t Want Never") that sneak up on you and, like the best of Westerberg"s work, linger. --Amy Linden