Careful auditioning and selection of gear, so system has been built to the type of sound I prefer, allowing me to listen to high quality music reproduction for hours on end.
Desire to change anything? Only to exchange tubed gear for solid state (to reduce maintenance effort, cost of new tubes, reduce warm-up time with the ability to keep the system on 24x7 so I could listen at a moment's notice) without spending loads of cash and without losing any sound quality. But I think this is not possible. So no.