Hi k-2so I was going to for there 65meg download and 19 upload and I was thinking of using the rtn66u but like I said the merlin firmware is old and he doesn't do it for that model anymore and I was thinking of just getting a decent stand alone modem if possible and a decent router if these stock asus routers origin do are uselessWhat is the expected speed of this new ISP? The existing RT-N66U may be all you need.
RT-AC68U even has beta FW for AiMesh 2.0. It's still the most popular/reliable Asus router.