I don‘t think going up in source components necessitates doing the same with speakers, until such time you’re ready for that move. And the “big boys“ need not always mean big $$ as that says the two are (always) correlated.
I visited the dealer event in Seattle last month and heard most of the Wilson line-up (the V Series). Most were played with typical Wilson partnering Dagostino, dCS, Transparent, and a lot of audiophiles like that sound profile, which I will say (imho) is quite a bit different from Mcintosh (been a while since I’ve heard that pairing). As I mentioned earlier, I used Audio Research with Wilson Sasha and Alexia and loved the sound, accepting the lowest octaves are handled differently with ARC tubes vs Dag SS. (Wilsons like power and the low registers are served well by SS amps — not implying tubes aren’t good, just different.)
But now after living with Pilium and several different speakers, I suggest again the Pilium kit is worth auditioning. An integrated gets you serious taste of Pilium sound without getting into higher prices. Knowing the liquid sound of Pilium is more to my own taste than the Dag stuff, I think it would be magic on Wilson speakers. My opinion too you’d find it a big step up from Mcintosh.
Hopefully you wouldn’t need to travel far in EU several dealers exist.