If Matt Moore is indeed available then he should undoubtedly be your first choice. Harvey is another 2012 rookie (if hes unowned) NYM SP.
2013 rookies to consider: Bundy Bal SP, Wheeler NYM SP, Taveras StL OF, Profar Tex SS, Myers TB OF, Skaggs AZ SP, D'Arnaud NYM C, Zunino Sea C, Cole Pit SP Miller StL SP,
Those guys will all make an impact at the MLB level this year, and likely all before or around the Allstar break.
Unless their are multiple top-30 players available in the regular draft, then its likely your team wont be in the championship hunt this year, so I would lean towards grabbing the 2013 rookies.