Hi!
I was in a similar position a couple of years ago but with the old KEF R11 (non META). After I had listened and borrow home several different brands in the same price range, although the old KEF R11 was a bit cheaper then the Elac Vela fs 409, I preferred the Elac's.
The R11 are objective the better loudspeakers when it comes to distortion and following the Harman frequency curve. The directivity of the R11 are also better. The R11 are super easy to adjust the frequency response curve to your preference thanks to all that I mentioned above.
If you think they sound to "dark..." for lack of better words, you could just raise the Tremble with EQ.
Why I preferred the Elac's was because the wide soundstage, also they have a bit of a raised tremble in the 11khz to 17khz region when measured on axis at 1m with the mic position in between the tweeter and midrange. That gives the Elac's a little more detailed sound than the R11
The measurements (Vela fs 409) I've attached are measured in room at the main listening position 370cm from the front speakers. NO EQ. NO sub.
I've also attached one (the blue one) where you can see the difference the tone controls can make if you find the Elac's to bright. -3dB on the basic tremble tone controls. NO sub.
The blue and red one are both L + R.
One is measured at 1m on axis of the left loudspeaker. NO EQ
Both the 409 and the R11 have plenty of bass but I still use 2 subwoofers anyway.
If you have the possibility to borrow the loudspeakers home and listen to them in your own room, then you can make your own decision based on your own subjective opinion.
If not. The KEF is a safe bet in my opinion.
Kind regards