PSB Alpha P3 - ~22cm - $400usd/pr - rear port
Polk Audio S10 - 21.3cm - $158usd/pr - rear ported, but has a deflector so distance to wall shouldn't matter
SVS Prime Elevation - 23.49cm - $400usd/pr, rear port - roll off at 80hz, perfect for pairing with a sub.
NHT SuperZero 2.1 -22.86cm - $125usd/pr - sealed, not full range, designed to pair with a sub.
Micca MB42X is - 24.13cm - $80usd/pr -rear port
Micca RB42 - 22cm - $130usd/pr - rear port - "long-throw" woofer for added low end, otherwise very flat freq response. (The MB42X may sound better in your setup)
Covo-S may even surprise you if your sub fills in your low end well- 13x13x10cm - $45usd/pr - rear port