Parasound Halo A51 five-channel amp. Or a combination of the A21 & A31 amps. You can use the Halo A21 stereo amp to power your front LR speakers and use the A32 three-channel amp to power your center & surrounds. These are great performing amps especially for the money. Or even the big Rotel RMB 1585 five-channel amp (class AB) will be better than your Emotiva five-channel amp.
For used amps I would look at the McIntosh. They pair well with Focal.
Or just like rshad0000 recommended the Krell Theater amp that he's now using to power his Focal Sopra speaker system.
Regarding your center channel speaker, you should get a matching Sopra center speaker for timber match. Your Focal Aria center isn't the matching center for the Sopra line. It's very important to get a matching center channel speaker with your front LR main speakers.
For used amps I would look at the McIntosh. They pair well with Focal.
Or just like rshad0000 recommended the Krell Theater amp that he's now using to power his Focal Sopra speaker system.
Regarding your center channel speaker, you should get a matching Sopra center speaker for timber match. Your Focal Aria center isn't the matching center for the Sopra line. It's very important to get a matching center channel speaker with your front LR main speakers.