ROON is the only way I roll. I am definitely a power user of ROON. So no interest in Aurrender (I have heard it). I prefer a $400 cheap computer to run my ROON core in a far off room away from my 3 ROON Endpoints. I use fibre optic to make any negatives of using a $400 computer far away from my gear go away.
The X1 is a great streamer and I owned it. I like the DAC of the Schitt Yggi+ Less is More over the X1's DAC. The streamer on the X1 is great as is the LeedH volume control. There is a new Lumin streamer that takes the DAC section out and is cheaper. That would be what I would get if I went back to a Lumin streamer. The X1 DAC is very good but I like the Schitt more on the top end.
The Sonore OpticalRendu is as good as the streamer on the X1, but sounds different. A bit calmer over the wild child streamer sound of the X1.
The PlayBack Designs Streamer-IF is maybe my best streamer. Unlike the other 2 which used fibre I am using Ethernet and SPDIF for the PlayBack Designs streamer into a Benchmark DAC3B. That stream sounds great. The plan is to buy a PlayBack Designs Dream DAC to use the Plink of the Streamer-IF (so fibre). That Plink streamer is likely going to be the best I have ever had. It only works on Nagra and PlayBack Designs DACs.
The main question for you is ROON or no ROON.