My system is in the lower 5 figures (under 20K) and most of it was bought used. I got JBL XPL 140 speakers, Lexicon MC12 preamp, LX7 amp, Modwright/Oppo BDP 95, JBL 2241 Sub, Crown XLS 1500 sub amp.. I heard a 6 figure system with Wilson Sashas and It didn't grab me at all. My System murdered this high dollar big name set up. This is my end game system and I ain't worried about it. I am still doing tweaks on it, but I'm done shopping.
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.