I'm currently using a FVS338. It seems more stable then the FVS318 i had, and i like that it has 8 LAN ports on the back and 50 available VPN tunnels. With the LAN ports i don't need an extra switch to connect all my cables. And currently i have 19 seperate VPN tunnels going, so the FVS318 is out of the question.
It seems that the FVS338 is no longer produced, at the very least it seems to be out of stock everywhere. (1 hour on phone with netgear still can't get an answer)