My day job lets me "play" with "fucking expensive ones", I love that statement Claudio. If you want commercial hardware that handles large PPS rates you get purpose built hardware, not a Cisco router.
I also support 100M feeds going through Soekris 5501 running OpenBSD and they perform very well.
I also want to add in the comment that any IPv6 filtering is done in software, no matter who's box you get. diana