need help with outdoor system

hi. my wife and I just bought a hot tub, and I'm wondering what solutions other audiogon'rs have found for outdoor music systems. we want music out there and I'd like to control it from my iPad, I have a water resistant cover for it. one of my friends has suggested I just buy an iPod dock and be done with it, but I'm looking for a more sophisticated solution. I have a denon AVR that will run two zones, but I'm reluctant to punch holes in my wall to run wire outside. I've also heard that outdoor speakers don't last, but I think def tech has sine decent offerings. thanks in advance.