I didn't mention Neumann KH120, since it's outside of your budget.
I believe they are
650 EUR/ea...so will be 30% over your budget.
They measure just as good as KH80's but with deeper bass of course:
https://www.audiosciencereview.com/...asurements-take-two.11323/page-22#post-425238
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The spinorama was provided by Neumann, so I would expect the measurements to be accurate. Although, I would personally ignore the bass bump at 55hz. I'm not sure if this is real or some artifact of their measurement method.
Anyway, they will play louder than KH80 and with less distortion, so it's a worthwhile upgrade if you need more output over the KH80's.
Regarding digital room correction, I see that you're using IK Multimedia's ARC 3, which is better than not using any room correction.
Since you have a measurement microphone, you can easily find the best spot for your studio monitors and each wall by moving the speaker and re-measuring.
The recommendation according to a Genelec engineer is to place the speaker close to the wall, because the boost in bass energy can easily be compensated (with room correction, using EQ).
Here's what I mean:
How to get a good stereo image?
You said that the studio monitors are 1m away from each other, and if you're sitting equilateral triangle, you should be 1m away as well.
Studio monitors have a critical distance, where the direct sound and diffuse sound change.
Genelec has a great table that summarizes these concepts at
https://www.genelec.com/correct-monitors
Genelec 8330 (same as 8030) is 5.125" woofer. => has critical distance of ~1.8m
Genelec 8350 (same as 8050) is 8.0625" woofer. => has critical distance of ~2.1m.
This means that if you have a smaller 5" woofer studio monitor, then you shouldn't be sitting more than 1.8m away from them.
This means that if you have a larger 8" woofer studio monitor, then you shouldn't be sitting more than 2.1m away from them.
The table also shows the minimum distance where the summation of the drivers occurs. If you sit too close to the speaker, you're not hearing the proper summation of drivers.
For 8330 it's around 0.5m, which means you don't want to sit as close as 0.5m away from them.
For 8350 it's around 0.75m, which means you don't want to sit as close as 0.75m away from them.
Now, I'm making the assumption...I would take the guidelines above from 8350 to apply to Kali IN-8v2 as well, since they're both 8" woofers.
All this information tells me that a larger size (8" woofer) studio monitors can still work if you're sitting at least 0.75m away, and no more than 2.1m away from them.
I hope that helps.