One last suggestion…
Don't be in a rush. Order speakers in smaller steps. Order two smaller speakers, less expensive speakers, such as the Elac Uni-fi UB5. Use them for the front 2-channels. That way you can find out if you like their sound. This can take some time.
If you do like them, keep them. Order more of the same, or order larger Elac speakers for your front left & right channels, plus a dedicated center channel speaker. Use the UB5s for rear channels. And if you decide on something different than Elac, you can still use those UB5s for rear channels with other speakers in the front 3 channels.
I wouldn't want you to order 5 expensive speakers, only to find out later you really don't like them.
In the long run, the speakers you choose are far more important for sound quality than what AVR you use. Most newbies, such as yourself, don't understand that at first. They dwell too much over choosing an AVR, only to find they are unhappy with the speakers they chose.