The Linksys Max-Stream AC5400 MU-MIMO Gigabit Router (EA9500) has been available in Singapore since 1st August 2016. It is retailing for S$539.
The EA9500 is the highest-end router of the Linksys Max-Stream family. I did a review of the mid-range model which is the Linksys EA8500 Max-Stream AC2600 Router back in October 2015.