Which players selected in the 2008 immediately take over as their organization's No. 1 prospect? It looks like lefthander David Price beats shortstop Tim Beckham with the Rays, but what about third baseman Pedro Alvarez with the Pirates? First baseman Eric Hosmer over shortstop Mike Moustakas with the Royals? Catcher Buster Posey over first baseman Angel Villalona with the Giants?