I guess he will like Morocco better, if you come to Morocco first, then go to another Arab country people will sound as if they were speaking very slow, because your ears will be trained for fast arabic
don't tell me you'r not convinced yet, in Morocco you will find the toughest level of Arabic, if you start with it everything else would seem easy
I'm just playing Jonne, Jordan or egypt is a nice place to start your Arabic practice, Morocco is only if you want to have fun and to see the beauty of Nature