The ambivalent allure and ennui of life on the sunny Pacific Coast runs through Ride the Black Wave, the self-questioning fourth album from fab San Diego country-rockers the Donkeys. Whether to remain in Cali or move to France is the nagging question in “Sunny Daze,” a mellow meditation employing the band’s winsome harmonies, serpentine keyboard and woozy slide guitar. The Donkeys cut to the cosmic chase in the slithering, sitar-driven strains of “Imperial Beach” and “Blues in the Afternoon,” a condensed account of the great Western migration. But where do you go from there? If not France, then the Hawaiian-flavored “Brown Eyed Lady” and “Bahamas” suggest other viable options.