Fantasy Baseball: Who Would You Rather Have?

In Al-Only keeper leagues, the certainty of a $20 Jake Peavy, who can't be kept beyond 2010 but must be protected, or the chance of a single-digits closer in Billy Wagner, who can be kept through 2011 if he signs with an AL team but need not be protected if he signs with the NL in the off-season?

$260 draft salary.