I have a one button turn off solution for mine, but it cost a little under $500. The cost may have gone down since then. It's the Harmony 1100 remote. Newegg.com has the 1100 for $300 and you also need the $100 RF extender (I think it's called). Anyway the remote sends RF signals (Radio Frequency) to the RF extender, which converts RF to IR (Infrared) and flashes IR to your devices.
Once it's all setup (slight learning curve there, but not too bad), all I do is push the power button on it and it shuts everything down, which nicely cycles down normally and not just yanking the power.
