I have a couple of hopefully quick questions please, on which would perform better as front speakers in a home cinema, DSP5000 24bit or DSP5500 18bit?

The room is 7M x 5M with a 3.5M screen and is a dedicated cinema.
Meridian kit includes:
DSP5000C
M33 sides
DSP5000 rears
Early 561 processor
REL Storm subs x2.

Will only x1 sub work when I use the sides?

Thanks, all opinions welcome!


The kindly builder fitted x5 Opus speakers in the ceiling but these are switched off until I upgrade to "Atmos 2" !

.