I can throw in with my NF4X - The one that went over 488MHz last year in the same kind of comp and I hope it's up to it again.
I'll see if I can get the world record for Socket 754 back while I'm at it but not sure how well the rest of what I have can/will do but we'll be finding out soon.
The best bet for me would be my MSI 790 FX-GD70 with a C3 chip, namely my 555 BE.
EDIT: Just put this one up to push USA's average score in stage 6 to over 400 points.
http://valid.canardpc.com/show_oc.php?id=1592282