Hey havocman ,
I go by my ears, not OFC vs OCC or by measurements , and for low level Acoustic Zen has been my favorite for a very long time, running Absolutes between my DAC and preamp and Matrix Reference preamp to amp... also Krakatoa power cords on most stuff which are amazing...
The AU24’s I used to have years back were very good and thin which I liked, but I bought the Anti Cables which were very cheap and had the risk free trial just for a lark and I ended up liking them better, much more and very very tight bass, I ended up selling the Audience AU24’s here on Audiogon and made back I think over a grand... the new Flex 4.2 is a big upgrade and pretty inexpensive... Maybe you should give them a shot, you might be surprised, I think they do a 30 day risk free trial still but I’m not sure