Will you be open sourcing the verilog cores either on release or after a period of time as to preserve these consoles? If you're worried about clones coming out, you could always go the id Software route and open source them after 5 years or so.
Try out MarathonMan's uber experimental multithreaded RDP. Runs 150% full speed on my computer.
Then again, the regular single-threaded version also runs 85-100% on my computer.