Unless I am misreading your post, it is showing 148,000,000 bytes per second (AES192, which is what I will use due to the timing attacks on 256), which is 1gbit/s. I was also assuming that the test only used a single core, so if I had 2 clients, I could possibly get 750mbit - 1gbit per client (possibly a little less due to losing turbo when using both cores). Or am I wrong somewhere?
Would you be willing / able to do an iPerf test over OpenVPN to test the real world performance?
And either way, I was looking at crypto cards, and understand the VPN14x1 series to be in popular use. Is that the one that is often recommended? What about the Exar DX 1700 series?