Kef front stage for a small room

I am looking for a little advice.

My room is only 9m² and I am building a tiny home theatre with a 5.1 system. MLP will be around 2.5m from the front.

I am hesitant to back down on the Q6 meta centre as I understand that is the most important part for clear vocals.

Avr will be either a denon x1800h or 3800h if I can find a nice deal.

I'm torn on the front LR's. Would Q150's be feasible in this arrangement, or do I fork out extra for Q1 metas?

The proposed system;

XGIMI AURA 3 Max

£1,600

Denon AVR-X1800H

£449

KEF Q150 L/R

£200

KEF Q6 Meta centre

£699

Polk ES10 surrounds

£149

BK P10-150-GEM sub

~£313

Total

~£3,410

I would prefer to stay under 4k in total, including the beamer that gives £600 spare, a 3800h would eat a chunk of this, but ideally keeping costs down where I can.