autoswitching dac?

I have three digital units I would like to configure into one dac, via coax and to be autoswitching, so I do not have to switch input manually or remotely. I also wanted balanced analog outs. Is there one out there? Call me lazy, but there are enuff buttons to push to run a system.
All replies would be greatly apprieciated.
THET HAD SOMETHING LIKE THAT A WHILE BACK. I JUST CAN'T REMEMBER THE BRAND .I DON'T THINK IT HAD BALANCED OUTPUTS THOUGH. THE PEOPLE AT AUDIO ADVISOR SHOULD KNOW. might be worth a try. I am sure there are switching boxes for digital, but most are for analog. A decent pre or processor can do it. My Audio Aero Capitole Mark II Cd player has digital inputs for coax, fiber optic, AES and some that I have never heard of.
The Birdland Odeon Platinum may be close to what you are looking for.
I think the Genesis Digital Time Lens might work this way too. It has an input for virtually every digital signal (Glass, BNC, AES/EBU, etc) and multiple outputs too. I am thinking it checks the inputs in a certain order and then uses the first input it finds active as the signal sent to the outputs.This would allow you to have multiple digital sources hooked up to the unit which could then drive one DAC.
MSB DACs can do this.