Thank you for all those who took the time respond.
After lookingf at a number of other threads on here, I have decided to reconsider my amps and I'm starting a search for a valve pre and mono blocks that will give me a similar sound signature to the ZH but build upon it.
As a ZH-270 owner i can recommend a Goldmund MIMESIS 2 if you can get one s/h. Mine has died now so i will switch to an EAR 868 or EAR 912. Both give superb results with the 270.
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