Thank you @ianderson for your post that directly compares some of the options I am considering.
I have a SGC i9 G3 on its way here so will start there on the server side along with my current Signature Rendu SE optical as the endpoint, which I believe would be considered a step up from the opticalRendu depending on the PS you used. I like having an endpoint with a USB output, which I can connect into my Singxer DDC, from which I can run a variety of output connections to a couple of different DACs I am using.
After getting the i9 set up, I believe my next step may be to compare endpoints between the Sig Rendu SE o and the Innuos Pulsar about which I keep hearing good things. The other configuration I considered was to purchase an Innuos Zenith M3, to use as a server only, to feed the Pulsar as the endpoint. Either way, having the Pulsar as an endpoint would allow me to try the Sense app, which is possibly a reason to choose the Pulsar over the Sig Rendu SE o. My plan is to get the i9 set up and then directly compare the Pulsar against the Sig Rendu SE o in my system.