Hi Alex,
Mine is Creek 4330 MKII with remote control.
So far, it's the best amp that I've owned. Very warm and plays music with full emotion. (despite its looks and price)
I have tried several permutations of power supply connection, i.e. amp -Tacima-Mains, amp-AVR-Mains, amp-Tacima-AVR-Mains..you name it.
But I still come back to direct power connection to Mains outlet.
However, there's still one more 'affordable' tweak that I'd like to try - that is replacing the existing IEC socket say...with Tyco RFI Filtered IEC ones, and perhaps the power cord to a Belden unit too.
Hope that you'll succeed in finding the best way to make your Creek sounds better as well..