Ideas for Pre/Power $9000?

Integrated/receivers are all I've ever had. I figured going separates would offer better upgrade options for the digital side🤷‍♂️. 

Regarding my music preference, it seems like most folks write off modern metal as super compressed and low quality. I don't believe that is the case across the board. One of my favorite bands, Between the Buried and Me, are extremely dynamic and the recordings are quite good.

I'm a metal guy as well. I currently have a Lyngdorf TDIA 3400 and had the smaller 2170 a few years ago. Amazing sound quality IMO and the Room correction is a must have for me. Music especially metal sounds much better after room correction. There's a lot going on and its fast. Sounds like a blur comparatively with room perfect off. It's like it just times everything out perfectly when it hits your ears. Something to consider. Can pick up a loaded used one for around 4k. 8kish new. 

It would do wonders in your non treated regular ole family room! :-)

I'll definitely keep some form of room correction in mind. Thank you!

just start looking at Echo website..lots of great deals on many many brands of used gear…..

I'd split your budget in half.

Half for amplification and half for new speakers.