Recently I came to similar conclusion. Without PSM156 I didn't really care about speaker cables (Atohm ZEF, they are in general described as quite good in the price range). But now since I have PSM156, I everyday look at those cables and I'm strongly considering some UP-OCC copper cables. Something like Neotech Nemos-3080 or maybe even Nes-3001, or alternatively RAMM Amadeus 5 MK2. Those are the three I'm deciding between now.
Now as you wrote, there are another alternative on Aliexpress, just wondering if those are serious competitors to those three mentioned. I never gave enough credit to things on Aliexpress, but maybe that's not entirely right approach.
It's crazy what PSM156 will force you to think about.. I even removed the old bananas connectors from the speaker cables, cut a bit the ends and connected as bare cables just to see if there will be any improvement. With PSM156 in, I tend to hear every single nuance or change in the system. I know oxidation is a concern, but I think oxidation will be always there, even with spades or bananas installed over time. And I didn't change anything on the speaker cables last 10 years
, so I think they will survive till I will figure out which speaker cables I will buy eventually.