Suggestions on minor upgrades to purchase

Hello everyone, I’ve recently sold most of my old system due to wanting to try some different components out. Recently I purchased a rel 212se to pair with my Martin logan esl impression 11a’s and I am curious as to what else minor upgrade wise I could purchase. Im 85/15 movies/music and as for electronics I am utilizing a pair of ps audio m700 monoblocks with a Marantz av7704 processor and as for conditioners I have a furman elite 20 pfi and a furman elite 15 pfi. I had recently looked into possibly purchasing some cheap power cables to replace stock(I don’t believe in the sparkly effects expensive power cables bring as im not a music buff) and idk which brands to look at. As for streamers I barely utilize my Lumin u1 mini and thinking of possibly downgrading to the new node since Apple Music is all I listen to(would this heavily degrade the quality?). Any suggestions would be fantastic, just looking for a few minor upgrades possibly to get my esl 11s a bit more transparency and detail.