At first I was trying to buy "Asus Wireless-AC5300 Tri-Band Gigabit Router" until someone said,
to solve my problem just look for an "Extender" and pass me the link below. Im looking for this:-

Link 1:
https://www.repeaterstore.com/pages/wifi-bo...der-differences

Link 2:
http://www.amazon.com/dp/B00MUVFOH6/?tag=repeat0f-20

Is there any product / brand that SIFOO can suggest me? Price is not a problem for me but if i can save
its good though. Asus? NetGear? Cisco? TPLink? ProLink? Zyxel? Thank you and much appreciated.

Actually I think any brand will do. As long as you think that its reliable enough with a good warranty coverage , it shouldnt be an issue.

Thanks for the advice, already bought ASUS RT-AC5300 from Singapore Asus. Problem solved.