Holy cow, this is wonderful. It's hard to come by a chippy song that sounds so epic! I really dig the way you did the rain and thunder sounds. The only thing I don't like is that the rain is a constant white noise through the song, it's kind of dull and my ears go straight to it. Other than that you have a great song here. (I voted 5)
Please contact me if you would like to use this in a project. We can discuss the details.