Esoteric SACD player owners, do you use the built in DAC or an external DAC and why?

To all Esoteric SACD player owners that have the built in DAC inputs...do you make use of those inputs to say act as the DAC for a TV TOSLINK input or SPDIF input from a network streamer?  

Or do you use a separate external DAC for those needs?

Thanks,
Jason