Great arrangement
but, it doesn't exactly loop well, meaning it's not very subtle at all, really. At least not in my opinion. The mix itself is great, and I really enjoy listening to it, but the fade-in at the start combined with the ending few seconds you chose do not make for a seemless loop.
Personally, I think you should keep the fade-in because it works well and sounds good, but then maybe fade-out in the same manner at the end, so it just sounds like the song is quieting down a bit instead of stopping and starting over.