The Monkees' first two albums contain such a wealth of artistic delights and pop epiphanies that double-disc reissues like More of the Monkees complete with rarities, outtakes, and alternate mixes are long overdue. Or so the revisionists at Rhino would have you believe. In truth, the band's truly enduring contributions don't extend much further than hits like ''I'm a Believer'' and ''Last Train to Clarksville.'' Still, some of these trifles do seem more engaging than you might remember (e.g., ''Take a Giant Step''). And admit it: ''(Theme From) The Monkees'' is probably playing in your head right now.