out of the options I will definitely rule out the PMCs, not good as far as accuracy or so I've seen so far, and seems you prefer the MTM configuration, which from measurements so far, mostly just don't work especially for dispersion and weird interference cancellation issues in return for some SPL, if you insist on the list it looks like the KS A200 could be the best bet, or I would say get some upright 3way like Adam S3-V or Focal Solo 6 Be.
Genelec and Neumann should be good for studio, especially the Neumann with KH750DSP so you could use their MA-1 for room mode correction, or genelec 83xx serise with GLM.
seeing you are using JBL LSR 308 and adam S1X which is quite ok in dispersion department and linear frequency, I think the best bet you can get is get something with enough bass extension and the calibration DSP to counter the room modes or console reflections. IME that EQ out the huge reflection peaks did clean up the sound and imaging a lot
Since you quote in Euro I searched in Thomann,
Calibration System and DSP Control Suitable for the series (SAM) 8200, 8300, 8400, 7200 and 7300, GLM software (download), Measuring microphone, Network interface, Microphone holder, USB cable, Compatible with GLM 4, software available as download...
www.thomann.de
10" Subwoofer 300 Watts output power (Class-D), Frequency response: 19 - 100 Hz (- 6 dB) / LFE channel 19 - 150 Hz, DSP filter for room adaptation, Phase position adjustment, Dip switch for manual room adjustment, 7.1 Analogue XLR inputs and...
www.thomann.de
Active 3-Way Studio Monitor Equipped with: Two oval woofers 5.13" x 2.13", 3.5" and 3/4" coax-midrange-tweeters, Amplifier: 72 Watts Class-D bass, 36 Watts Class-D midrange, 36 Watts Class-D tweeter, Integrated DSP, Frequency range: 45 - 37000 Hz...
www.thomann.de
using 2x 8331 with 7360 and GLM cost around 5.5k Euro, if you go cheaper on 8330 you can even use dual sub if you wish for a full range linear sound in LP, that should work better than your current studio quite a bit. of course I myself is a Genelec fan so it's biased, similar offerings can be found for Neumann