Help! Missions M74 + 70ASE looking for suitable center

[BeetrootToYourself]

Hi There Guys,

Semi new to the form and appreciate some insight.
Looking to slowly start building my 5.1 system around my Mission M74's.
Thanks to @mr.c i'm rocking a new to me: Yamaha RX-V467.

Can anyone recommend a suited center?

Also, sidebar - from my research - the backs really arent too important. Is this debatable?

Thanks, excited to hear some feedback.
opcorn:

 

[Judy@Rtec]

 

[BeetrootToYourself]

 

[bearenzo]

 

[bearenzo]

 

[Judy@Rtec]

 

[BeetrootToYourself]