I have both Eichmann eXpress 6 and PS Audio eXtream Statement interconnects in my system (Denon 2900, Krell KAV-400xi integrated and Rocket RS750 Sig's) and found them both to be really good. The Eichmann's about 6 months old and the Statement is only a week old. But, there's a difference. The Eichmann has a little wider soundstage (with my gear and in my room) than Statement, and Statements, although not fully broken-in yet, has a higher resolution in a upper medium and high freq. range. Also, they have a higher ceiling of a sound field, if I can say that (I'm not sure if I'm using this terminology correct). What I mean is with Eichmanns sound fills my room up to 1/2 of the room's height, and PS Audio Statements fill it up to 3/4 and even higher.
Since my Krell is very revealing, there are some recordings that I prefer listening with Eichmanns (when there's a lot of high freq. info) and some with Statements.
Please, remember that these are the impressions I got in my room with my gear, but you can't go wrong with either of them, especially that PS Audio cables are 50% off right now.
Good luck and happy listening.