Carl wants to get a tablet to put his music on, and also download sheet music. Leo recommends the iPad because its the only tablet that has iTunes, and there are a lot more music apps available on iPad. There will be a new iPad coming in October, so if he can wait a couple months, that would be best.
If he wants to get an Android tablet, there is a way he could easily get his music on it. If he uses Double Twist on his computer and on the tablet, his music will sync up.