There are some vintag-y gear that may perform well, but everything I've seen makes tradeoffs for that look of a wide and squat baffle.
As I recall the Arendal measurements I've seen, they are pretty legit. While I haven't heard them, agreement seems to be that they are pretty good Speakers.
Why do you want more? I could see a separate system in a different room like what
@WookieGR is in the process of doing. But good Speakers are good Speakers. You got a pair in the room. what do you think you are going to get from a different pair that you can't get from the 1723s?
Or, perhaps more to the point, what is it you
WANT to get that you seem to not be getting from the Arendals?