A wonderful system you have. Seems like a nice blend of audiophile vs. budget equipment choices. Everything seems just perfect including your modern stand. I like the wood base on your SL1200. Nice touch. I don't hear much about Plinius these days. Is your integrated amp still satisfying after all these years? If I remember correctly Plinius and Totem have nice synergy.
I agree, leaving electronics on 24/7 does make a noticeable improvement. The DD Technics are very dynamic in my experience so that can add to the dynamics your experiencing. I'm using a DD Technics w/ an Ortofon cart into a tube amp and it is very punchy. I think that Tech/Ortofon is a good combo for PRaT.
I have always loved Plinius and the Polk LSI series are hidden audiophile gem. Both are very smooth and relaxed. Is the combo too much of a good thing? Have you tried the Plinius w/ more dynamic speakers, but maybe this combo has great synergy, as I haven't heard them together. What are your experiences? Anyway, I love your well thought out choice of equipment.