Hey there, I normally never post but I was in the same boat as you.

Might I suggest wireless speakers? They are amazing, no unnecessary cords hanging around, this makes it look very clean. I looked for speakers that I could also use outdoors and found this article that really helped me make my choice. Maybe it will help you too.
http://thetechplanet.net/5-best-outdoor-wireless-speakers/

Hope I was helpful