Harbeth 40.3's. Should I buy them?

ozzy62. The Spatial's X3's do not need subs. I did feel like they could be improved with a more powerful plate amp, however, and a few X3 owners have done that. I cannot use separate subs in my system due to the lack of pre-outs (although I'm cheating at the moment).

I've listened to Audio Note many times and know their capabilities. I don't believe they are the best option for us. For a second system, heck yeah. I WILL build one of their kits one day. Then I'll get an AN E-D.

I've never liked the Zu sound. But I get their allure.

Allnic A6000's w / an A4000 pre? Damn. That would make my early 60's Zenith clock radio get up and perform 3D music. I might pay just to hear that combo!  That combo might even smoke my former best, the Joule Electra VZN100's. I may have to revisit the AN E-D.

I know a former X3 owner that went the Fyne route.

If you like Harbeth an ANE's but wanna be able to rock out more I'd through Devore O-96's into the mix.

You should have enough power to drive most of what has been suggested here.  I drive my Wilson Yvettes, 86 efficient, with a 36WPC c-j class A amplifier.  Jazz and classical. I do use a JS Audio F113 sub.

If you want to get your money out of them later, the well respected brands like Harbeth, Wilson and Vandersteen are best.  Look at resales for reference.

Only you can determine what speakers appeal to you.  You have to listen to them in person for an extended session.  Some nice suggestions here but they are all different presentations.  I don't care for Magico, a personal thing.  They seem only to match with big solid state. 

All speakers need to have the front baffle at least 48 inches out from the back wall if you want image depth.  

Nobody mentioned B&W... that's odd.

Definitely risky with your room and amp. Your amp is very nice but has a 120 watt rating at 8 ohms 1Khz. Full bandwidth is more like 70 watts and probably no more than that at lower impedances.

The Harbeth 40s really need authoritative control of their large woofer or the bass will lag and be tubby sounding.

To get the best out of them requires a robust solid state amp stable at low impedances. Not that the Harbeths have low electrical impedance but the 12" woofer demands a solid reign.

Last time I heard them they were driven by Vinnie Rossie L2 signature MOSFET monoblocks and they sounded fantastic.

Time before that they were driven by a Parasound a21 and sounded bloated as heck.