I'm even in your dynasty league and it pains me to say that I think you should wait on Butler too. I hear Hafner and Manny comparisons with this near 3x minor league batting champion.
Billy Butler, KC, OF (ETA – June)
With a team batting average of .241, you have to start wondering when Butler will get the call from the parent club. After hitting .419 in 31 spring training at bats (.774 SLG%), Butler has continued to lace the ball at Triple-A Omaha (.337, 6 HR, 23 RBI. 17 BB, 12 K). With Royals first baseman Ryan Shealy hitting .096 and outfielder Emil Brown hitting .194, surely there is a place for Butler's bat (.343 minor-league BA in over 1,300 career at bats) with the big club. He's a defensive liability, sure, but his full-service bat will win more games than his defense loses – especially if they can find a way to utilize him at DH, not an easy task with Mike Sweeney in tow. Either way, expect Butler to force the issue by at least June.