what is the reasonable plug and play replacement router for unifi & hypptv below RM500 ?  i know the among the best is Asus RT AC68U, but this is way above my budget

i may need something with stronger antenna as my unifi port is boing to be below the stairs store room (maybe hard to get signal on 2nd floor)

As i understood from a few forum mentioned the stock router they give maxed out on 20mbps on wifi , hence even if you have 30mbps or 50mbps connection is a waste unless use lan cable

appreciate all advice and feedback, thank you in advance