How much to distribute on...

5.1 speakers(fronts, center, rears, sub)

and

Pre/Pro & 5 channel Amp

If you are planning to spend about $9000.
60% music and 40% movie.

I think I'll ended up spend about $4000+ on the 5.1 speakers
(I bought used REL Strata III for $800, and probably get Soliloquy or Sonus Faber front center rear speaker pacakge for around $3200-3500.

And maybe get new/used Antem AVM20 or Krell Showcase with Bryston Amp(s) will be around $4500 I geuss...

Turned out to be around 50% for the speakers and 50% for the pre/pro + amps

Is this good distribution?
or would you save some money in one area and spend more on other...