ASUS RT-AC68U or ASUS RT-AC87U

Hi all

I've narrowed down my search for a AC router to replace my UK virgin media Super Hub 2ac as it keeps dropping out

So is there much in these two ? ASUS RT-AC68U or ASUS RT-AC87U

I have mostly AC enabled devices, ps4, NAS, smart TV etc etc

Also is merlin the goto firmware these days ?

Many Thanks