Speakers choice with Octave v80se

I am currently using Octave v80se which have KT150x4 with Super Black Box. (https://octave.de/en/htdocs/verstaerker/v80se.php) My listening area is 10ft x 18ft and  I would like to purchase new speaker. The below are my choices
1. Wilson Audio SabrinaX
2. Avalon PM1
3. Focal Sopra N2
4. Others
Any comments are appreciated