I feel 20-25% of your audio system should go to your Loudspeakers
having owed a Audio store synergy is key ,and the most distortion by far comes from your speakers roughly 3-5% on average when pushed ,Electronics under 1%
cables to 15-20% of your system budget should go there once gone you can’t make it up ,your front end is where everything starts and stops put in at least 15-20% , a high quality integrated amp in many cases better sound ,and better value
for the preamp synergy is built in with-the amplifier , less power cords, and interconnects an easy savings of-over $1 k for anything decent .
i am referring to a integrated say a minimum of$6 k on up and look closely to the volume pot a silver round Alps can like on prima luna for-example run it’s a cheap $25 carbon plastic conductive pot you loose a ton of low level detail,
agood resistive ladder ,electronic,or relays far better . Separates can be better but much more money outlay I separate components plus a good power-cord foreach as well as extra pair of interconnect's.