Clarity cap CMR’s and Mills resistors or Path can be a nice option maybe start off on tweeter section. There are a lot of nice caps out there. just need to know if you like the Juniper or Vcap sound or what’s in between.
Do the best you can with your budget. Sometimes you can find used caps with your values needed, no break in needed most of the time. Those CMR’s took a long time to settle down. I tried Sonic caps there were okay but I would try others.
A good quality copper internal wire is always nice. On one set of speakers I ran external crossover. Not sure it made a difference because never heard upgraded crossover inside the speaker.