Amp and Preamp recommendations for Yamaha NS5000


Currently have SOTM 200 ultra -> denafrips terminator +dsp board -> Audio gd he9 pre amp -> dual bryston 4bsst -> NS5000.
I am loving the sound... just sounds incredible. But wonder about amp and pre amp upgrades down the road. Any thoughts on what might work well? These speakers are 87 db efficient.
So far thinking all pass labs amps + pre.

Ok with buying used. Would like to keep things under $20k if I can. Thanks.
smodtactical
Yes I can say the ns5000 is a true dark horse speaker. Not a lot of people know about it but its truly magical sounding. Astounding clarity, imaging, soundstage. It simply sounds so natural. My review has more details but I love them.

As for the ns3000 ya i agree they might be a bit small for my room unless I paired them with my dual 18 inch psa lol. But I like the ns5000 integration with my psa which I cross at 40 hz and turn them down.

As for amps. People on my discord tell me a pass labs xa25 would be more than enough for my speakers since my room isn’t that big. They are 88db and I am confused because even pass said that since the specs mention 200 watts to 600 watts that 200 at least would be ideal? Does more power allow for a more dynamic effortless sound? I rather go for an x250.8 that is being sold locally imo. I’m not confident 25 watts per channel would work.
25 watts would be a joke!

 Your used to 300.
stay with it.
no less than 300WPC.

have faith! 
There are 2-3 easy recommendations that come to mind for the 5000s:

a) Musical Fidelity 800 NuVista or the latest M8xi
b) Dartzeel integrated model??? (there's only one I think)
c) Accuphase e480

All are integrated and their performance (IMO) easily beats any separates you can get anywhere near the price.
Just an idea! Regards