I agree with Miko.
However, Arendal 1723 & 1961 speakers are both THX rated thus have a serious drop off in FR after 80HZ (as per THX spec) and will need to be paired up with a subwoofer for full experience. If you’re getting monitors or bookshelf speakers the the difference in low end won’t be that significant as day and night. However if your getting the towers well that’s a different matter.
Since you’re getting power amps for all of the speakers I’m assuming you have a large space thus 1723 most likely be better. More info would help to advice.