Amp and Preamp recommendations for Yamaha NS5000

Guys thanks for the suggestions:
@twoleftears Actually a local dealer does have an AX-5 twenty used for sale for about $5600 usd. I definitely am considering it. But kinda leaning towards going for a power amp so I am open to a future pre-amp upgrade.
@verdant Chord amps seem interesting. I don't know how easy it would be to get one up here in Canada. Heard chord is kinda a pain to deal with also.

So...soundorg just hired three people in Canada.  I am sure you will be able to get Chord gear up there.  
The bigger issue is that Ultimas are on back order for a couple months because of COVID 19.  They have had trouble getting parts like many manufacturers.  
Regarding Chord being difficult to work with, they did just change distributors in North America.  I had a great relationship with Bluebird.  I am off to a good start with Sound Org.  Both have been good to me and can’t say they have been difficult.  

Verdant thanks man I will definitely look into it.

Wow. Mark Jones was right about bridged mode sometimes being inferior to stereo.

I’ve had these brystons amps for well over a year. I never really tested out 1 amp in individual mode. Always using bridged mode with dual amps. Since the guy who is buying is picking them up in 2 days I tested single amp stereo mode... holy crap.

The soundstage grew tremendously, especially depth which immersed you in the music so much instruments seemed to surround you. Textural nuances became incredibly palpable and details accentuated with more separation and holographic layering. I could all of a sudden pick out subtle nuances that never jumped out at me before like they do now. The speakers vanished completely and closing my eyes I struggled to place the location of the towers with sound references alone.. its like the sound totally de-coupled from the speakers and just swirls around the room. This is a big gain in SQ and I actually save money with this gain (by selling 1 amp) !

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.