I wouldn't like to see Youkilis moved from first base, he hasn't made an error since last July, why mess with what's working? He might not be a rangy defensive first baseman, but he's as solid as they come at fundamental defense, we're so lucky to have that and it would suck if that got screwed up.
Leave Helton in Colorado where he belongs, I'll take my chances that Lowell's 2nd half offensive swoon will be matched by his return to defensive glory, averaging out to one very decent year.