My ST-10 just arrived this afternoon, so it's had just a few hours to burn in.
I've got a pretty simple system here (in Taiwan) - Mac Mini => Squeezebox Touch => Gustard X20u DAC => ST-10 => Fritz Loudspeakers LS/5-R two-way monitors. In August of 2017 I'll bring my D. Sachs preamp with me to round out the system. Oh, I may add an inexpensive CDP, too.
So far, I notice the ST-10 is a lot more powerful and better sounding than the IDA-8, but this is no surprise. Why the hell did I wait so long to get this amp?