Welcome, I went through exactly the same design choices a few years ago, especially when you have kids (parental control) and multiple Xbox’s which require OPEN NAT etc.
is one router sufficient or are you looking at a wifi mesh scenario to improve wifi coverage within your home ?
Also, how bothered are by you by using a sperate modem and router, or would you prefer an all in one option ?
and how big is the budget 
In a completely sane world, madness is the only freedom (J.G.Ballard).
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