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
So I sold my brystons and looking for a new amp.

Mainly considering pass (X or XA), Luxman (m900u or 509X) or CODA (no. 8 or 15.5).
1 interesting possibility came up though. The Sanders magtech monos. I have a local seller on them for a good price. But looking at the specs of these they have insane power, 2000 watts. Max input of my NS5000 is 600 watts. Prior to that my brystons were I believe 900 wpc in bridged mode. Do you think these are potentially dangerous to pair with the ns5k ?

Only if you are silly enough to turn it up full.Do you drive your car at its maximum speed?That could be dangerous too.The Magtechs are nice sounding power amps .I heard them with a Supratek Preamp and that was a very good combination.Of course they are designed to drive low impedance electrostat speakers but that does not mean they would not suit the Yamahas.
LOL. Ya I think if I hook them up I'll turn my volume dial so incredibly slow while sweating bullets lol

To reiterate: if I had up to 20K to play with, though ideally a good deal less, I'd be looking at separates from

Luxman

Aesthetix

Ayre

I'd love to grab an m900u. Pricing on it is tough though.
Used X150.8 or new Coda no8 are probably good cheaper options.