Spend as much as you can truly extend ,especially the most critical 2 pieces
the front end like Dac quality ,streamer LPS power supplies
and Good quality Loudspeakers.
How good is good enough?
Most of us here cannot afford six figure prices for each component (assuming that will bring the best sound.) So how far do we want to go to improve our systems? There are always bigger fish. When does it stop? It stops when we say it stops, when our gear brings us satisfaction. To constantly strive for better sound is an endless quest, not necessarily based on the quality of our set but on our personality.