Would you rather: max channels or max power receiver-to-speakers

[mattmardigan]

Would you rather:
[A] Use the maximum number of channels that your receiver can handle, but have less power to each speaker, or
[B] Maximize the power to each speaker by using less channels than your receiver can handle?
For example, the DENON AVR-S750H AV Receiver can handle 7 speaker channels, but presumably that would mean the receiver's power / hrz / performance split to each speaker would be less per speaker. But if you only used 5 of the channels and left 2 empty, would that mean those 5 channels would have more power / better performance per speaker?