Audio out switch for iMac?

Folks,

Anyone know of any single-button solution to switch audio to different outputs? I want to switch between three outputs: the iMac's internal speakers, external speakers, headphones.

Apparently there's no way to switch between internal/external in software? The iMac's audio connector is hardwired so one must plug/unplug the cable physically to make the Mac notice it.

I'm prepared to buy new speakers + cables + an external audio switch for this, or AirPlay. Someone solved it?

The Griffin iMic solves half of this problem; it only has one output, I need two...

Thanks

Thanks Hellhammer, the Z-10 look nice. This eliminates one problem: plugging/unplugging the external speakers.

However, the plugging/unplugging of the headphones will still be a nuisance. I have my external speakers in the other end of the room (big screen for movie watching), so I'll have to walk over there to plug/unplug the headphones.

Also I share my current external speakers with my PS3 (with a simple audio switch button). So this would mean keeping my old speakers for the PS3 plus adding the Z-10 for movie watching. Minus 10 Zen points.

Something like the Griffin iMic but with dual outputs would be a solution.