My main goals in hifi are an expansive soundstage in width and depth, and holography.
You want Synergistic Research. Speaker cables, interconnects, power cords. If you like what you have and want to get that expansive width and depth and holography without changing the overall character of what you have in any other way then what you want is Synergistic Research HFT, PHT and ECT.
These will all improve imaging allowing your speakers to disappear while throwing a wider, deeper sound stage. Search around a little, you will find everyone who has actually tried these is beyond satisfied. Its mystifying how they can do so much which triggers the usual suspects. But among those with actual experience there is no doubt. They all come with total no-questions return guarantees. Because they are that good.
They all produce roughly the same effect in roughly the same proportion but since you have a turntable I would probably start with PHT. The PHT come in different "flavors". I think Black Widow is overall the most neutral, while Green Dream leans a bit to the more liquid smooth side. Purple Haze is the only one I did not care for. They recommend one on the cartridge but try more, I have one Green Dream and one Black Widow on my Koetsu, plus one more Green Dream on my arm, and two ECT on the arm base. And one more ECT on my motor pod.
ECT you can use all over the place on just about any component. It seems like they might work better placed inside and directly on things like caps but I tried that and they work just as good if not better on the outside. We watch movies and sticking one on my laptop improved both the video and the audio so much my wife noticed without me even saying anything. We're talking serious, significant improvement here.
HFT will open up your sound stage like you cannot believe. Follow their recommendations, they are pretty good, and by the time you get to the Speaker Kit, well it is simply amazing how well they make your speakers disappear. Try em. You only thought you were hearing imaging! Ha!
Best of all these are "keepers". They come off as easily as they go on, and all will work wherever you go and whatever you upgrade to down the road. Keepers.