A rookie with 10K, seeking advise

The adamant "wires are wires and bits are bits" trolls who claim that investing in cable and power component upgrades is "nuts" are simply highlighting their complete lack of understanding as to how actual MUSIC (sound) is transmitted to the human ear, NOT to test instrument measurements

Amen.  

Since you’re not yet sure of your tastes yet and don’t have many viable options to go listen, I’ll recommend a system the shoots straight down the middle of the fairway (i.e. neither overly bright or warm) that will very likely blow you away. The best part is if I’m wrong you can turn around and sell it with little/no loss. This is the latest Joseph Audio Pulsar ll (upgraded) in gorgeous sapele wood finish WITH STANDS and a near-new Hegel H390 integrated amp.  I heard Pulsars driven by Hegel at a show and the sound was absolutely sublime.  Read the reviews of each to get an idea of their performance/sound characteristics.

https://www.usaudiomart.com/details/649877069-joseph-audio-pulsar-graphene-sapele-with-sound-anchor-stsnds/

https://www.usaudiomart.com/details/649881872-hegel-h390-17-mos-old/

You don’t need to be dumping tons on cables at this point. This looks like a very nice power cord and is dirt cheap — I’m actually buying one myself.  8AWG silver-plated copper, Teflon dialectic, and rhodium-plated plug for $39 1.5m and free shipping.

https://www.ebay.com/itm/202808747120

And here are very good Cullen Cable biwire speaker cables — 8ft pair only $340.

https://www.cullencable.com/crossover-series-speaker-cables/

This will sound outstanding and comes in right around your budget.  Just one option to consider.  Hope this helps and best of luck. 

With a 10k budget I’d clear the decks and start fresh — sell what you have to offset cost of the new system. THE single most important question is what sound characteristics are most important to you and what improvements are you’re looking for. Without that critical info this is nothing more than a crapshoot.