hi all I was seeking some advice as I used to be a BT customer with a nt666u router flashed with merlins firmware and was very happy with his firmware im now with directsave telecom and thinking of going with origin broadband in November when my contract ends as they use asus routers as there default routers they give you an asus n16 for free or you can upgrade for about 75 pound to the asus ac56u or upgrade again for 120 pound to the asus ac68u my question is which would be better or necessary for mainly gaming on a ps4 playing fps games and browsing or watching YouTube and secondly and most importantly can I upload merlins fimware on to these stock isp's asus routers I would be grateful for any help peter