i would like to recommend TP-LINK AC600. There are two version, T2UH and T2UHP.
Im using T2UH. really good for its price which is RM 105 (from Lazada) and I use it mainly for gaming.
But if u can find T2UHP version, go get it. It is better in term of wireless coverage and performance.
WTA 5ghz WIFI USB adapter