Google Music or Apple's iCloud?

iCloud is only unlimited if it is music purchased from Apple. That music doesn't count against your 5gb. With the Match plan (for $30 annually), they will convert all your pirated music to legit non-drm music, and that music will not count towards your 5gb limit. It wil come down to ease of use, cost, slick gui, and amount of cloud space allowed that will determine the winner.