Old and new routers, which to use as main router?

[PartisanEntity]

So I have an ancient RT-N66U which is going to be replaced by an RT-AC86U.

I would like to use one of these as my main router (connected to my cable modem) and the other as a wired AP on the upper floor to extend the network.

Correct me if I am wrong, but I am assuming that the new RT-AC86U should become my new main router and be connected to my cable modem, and the old RT-N66U can be used a wired AP? (Eventually I plan to retire the N66U and replace it with something newer).

 

[MarkyPancake]

I would definitely use the newer and more powerful device as the main router, so in this case that's the AC86U.

 

[castlefox]

@PartisanEntity FYI in case you didnt purcase a new one yet.... ASUS RT-AX86U ($249.99) and ASUS RT-AX82U ($229.99) have just been announced
https://pcper.com/2020/07/meet-the-rt-ax86u-and-rt-ax82u-gaming-routers/