Thanks for reality check on 2f and Cavium's USB. Good to know those limitations.

"Soft cores are a bit slow, although have seen CHERI running and it is cool."

You can put it on an Achronix to get around 1.4GHz potential speed. They're only $10,000. So much more reasonable than an ASIC with same specs!

http://www.achronix.com/products/speedster22ihd.html

Mortgage your house and buy one now before they get acquired. ;)