You might look into NOS Reflector 6H30-DR in the output stage, my experience is they are much better than Sovtek 6H30p. I haven't used them in an ARC product only my C/J pre where they made a big improvement.
Personally I would go for the tubes first, at least research them, then deal with leading edge grunge with isolation second.
The ARC equipment I've had,CD3 MK11 and VS-115, didn't need much isolation so be careful not to over isolate and lean out the sound.
Personally I would go for the tubes first, at least research them, then deal with leading edge grunge with isolation second.
The ARC equipment I've had,CD3 MK11 and VS-115, didn't need much isolation so be careful not to over isolate and lean out the sound.