I also upgraded to the Sonic Transporter i5 and Optical Rendu 2 years ago. The i5 serves as my Roon core. I also use the upgraded power supply sold by Small Green Computer for the Rendu. For the first time, I feel no need to upgrade my streaming system. I can play with DACs all day long knowing that I have a very low noise and transparent setup for retrieving and sending music files. Yes, it's a few more boxes and cables but they are very small. Andrew is extremely helpful. I have not had the first issue with this setup. Highly recommended!
Although this review should qualify me for a software upgrade, I absolutely love this streaming system. I was just too lazy to let others know before.
Jim