Wifi whatever AC2000+ they advertised needs your other end laptop/ phone/ streaming device to have same AC standard also. Else pointless for you to spend RM2000 on a high end wifi router.

From experience, a better router I have tested ASUS UHP long antenna series routers. They will work well for large not so obstructed area eg, medium sized industry lots in the range of 10,000 sqft & 3 floors. But it should perform less in houses due to more obstruction like walls.

But for wireless data management, the more expensive ones will do better job. The other way is buying wireless extenders. TP link is fairly cheap for less than RM100. I tried it on 2 occasions and it works pretty good even managing to extend guest network. But the cheap ones only extend up to wireless N. So a little give and take. I don't think there is a 1 stop solution for consumer unless you go enterprise.