what else do i need to improve sonic performance?

I would advise against spending money on ultra expensive wire, but you wouldn't listen, so what's the point. The fact that you asked the question says you want to buy something.
Cheers.

There's many different ways you can upgrade your system. A couple of people mentioned going with new power cords. I agree that they do make a difference. The one thing I would recommend, though, is to try the cables in your system before you buy them. In many cases, power cords don't make a positive difference. If you don't have a good local dealer that you can use, I would definitely call The Cable Company. They can send you a bunch of different cables that you can demo first. I have been using them for years and have been very happy with the results.

One other thing you may want to consider is upgrading your phono cartridge. I had the 10x5 and thought it was a great sounding product for the money. If you step up to the Dynavector 20x2. I did and think it was well worth the money. If your phono pre can handle it, I would get the low output version.

I have de ps audio phono that I forgot to mention.
Plus the luxman built in one.
I will call the cable company!
I will also look into cartridge upgrade, I think its the weakest link on my system today.
Re gards

I am a big fan of Pat Metheny and the Pat Metheny Group. I can tell you that on many of the albums, the music is absolutely wonderful, but the recordings are not great. A really good system will put a spotlight on bad or subpar recordings and equipment. I have just about everything that Pat Metheny has put out and will go to any Pat Metheny concert when they come to my area. But, as I mentioned, some of their recordings are not great. The music is, but recordings aren't and I definitely hear it in my system. One of my favorite albums is Secret Story. Absolute wonderful sound (music and recording). Check it out and see if the sound quality is better than on the album. I couldn't begin to suggest changes to your system. But obviously, in your opinion, changes are necessary. Therefore, find dealers or friends that will let you audition or borrow equipment to demo in your home. This prevents buying equipment without knowing what it will sound like in your system in your home and realizing that you made an expensive mistake. If you can't find a dealer, then a friend maybe. One piece at a time, until the issues are solved.

enjoy

I also agree with Philjolet but would add ditch the PS dac . I had listened to that dac with hi.rez files and transport. I was not impressed at all pick up a good tubed dac.