Which Wat To Go - Innuos Zenith III (USB cable) - Hegel H390 - Monitor Audio Silver 500s


I’m just asking for some advice on which direction I should take with the above chain for ‘bang for buck’ sound improvement?

Should I get a better DAC (Denafrips, Lumin T2, Okto Research etc!) ?
Innuos Phoenix USB Re-clocker or Phoenix Network
Improve cables?