Is the Asus AC86U (running Merlin) the best consumer based router for maintaining high speed using a VPN with encryption enabled?

I love love my Asus AC68U router but your speed will be severely limited using a VPN connection with encryption enabled.

I have read that the AC86U will be able to achieve high speeds even when using an encrypted VPN.

Is there a better choice than the AC86U? Anything even faster that is supported and works as well as the AC68U running Merlin?

Or have there been any announcements from Asus to a successor to the AC86U that will run even faster?