I prefer the second too. Can you try different colors for the tag line please? Can you try a couple more colour combinations with brighter rainbow colours please? (avoid red please) Everyone - providing i'm happy with these changes - this will be the winner.
I'm not sure if it's the right style. It looks too big and get's in the way of the logo. Could you please try different styles for the tag line? And try putting it in different areas such as under, between the q and g? with a speech bubble around it, etc.