I wouldn't recommend Asus routers. I used to have one, but got rid of it due to the serious security problems they were having:

http://arstechnica.com/security/2014/02/dear-asus-router-use...

http://thehackernews.com/2016/02/asus-router-security-hack.h... (some random article I found, giving an overview of some of the other problems)

Now I use a Mikrotik. The only downside is the UI is quite powerful and allows you to hang yourself if you're not careful. It's definitely not for non-engineers. However, it does get regular updates since it's targeted at a more professional market.