The RT-N16 is a not the best choice for running OpenVPN using DD-WRT.
Giles Brown "Giles of Warwick", Amazon
5 November 2014
Summary: The recommended builds of DD-WRT are too old for the latest configuration settings for OpenVPN (from say BolehVPN and StrongVPN). Although newer builds are available they seem to have issues. The router is likely to be underpowered for stronger encryption.
Summary: This router runs great right out of the box. The N wireless has good speeds for iPad, iPhone, Android devices and laptops. Should you want something more flexible, you can load DD-WRT onto the router.
Summary: Very happy with this purchase. Great extra router that I was able to program with a US IP address using a VPN. Great to receive US (or any foreign) content on Netflicks or other geo-location sensitive media. Use it with Apple TV or Playstation/Xbox.
Summary: Previously bought one of these for QOS after lots of research from an ebay seller. After being scammed and waiting for a refund, only to have to reorder from another ebay seller, it arrived and it worked great. It's pretty each to flash with Tomato and works very well.
Summary: This router can be flashed to run Tomato USB, the open source router firmware. Suddenly it goes from having the restricted functions usually found on a consumer router, to having the full set of capabiiies you expect on a business-grade router.