I’m not sure I completely understand… “the fronts cannot be setup as normal two channel”.
But the center channel is the most important in home theater. 85% of the sound comes from this channel. So, it is really important to have the three fronts positioned appropriately, of the same brand (voicing) and of high quality. The other surrounds can be of lessor quality… same voicing… but while not used as much it never hurts to have high quality if you can afford them .
Also, this sounds like it is intended to be a pretty high end system. I recommend modifiers the front to get the sound system to be ideally placed, not let the decoration drive the speaker placement.