I much prefer Gallinari to Iguodala. Gallinari's defense is questionable but he's a great fit as a stretch four next to Bam. You couldn't put all of the white guys on the court together because of defensive issues but they'd have a ton of shooting with Gallinari, Dragic, Herro, and Robinson. Heat already have a few defensive wings with shooting questions and no one knows what you're going to get from a 36 year old Iguodala, who hasn't played all season. The cost is a factor too though and I imagine Iguodala will be cheaper to acquire.