Yup, the router will work with both streamyx and Unifi. However you'll need to do some extra configuration of your own at your place to get everything setup, we can only configure the router with DDWRT and our VPN.
We can do Linksys or other brands, depending on DDWRT support for that particular model. Additionally, you will need one which uses a RJ45 port, as Unifi will require this.
Linksys E1200 say about RM280, depending on shipping to your place.
Do you have a particular model in mind?