[c-nsp] NSE-150 versus NPE-G100 versus NPE-G2

[Aaron Daubman]

Greetings,

I'm trying to gather information to make an informed decision between
purchasing some of Cisco's newer router options.  I'm having
difficulty finding good information to compare the:
7200VXR with NPE-G2
versus
7304 with NSE-150
versus
7304 with NPE-G100

These routers will be used in a mostly IPv6 R&D environment where IPv6
and GigE performance are the most important requirements.  Perhaps my
cisco-search-fu is just lacking, but I couldn't find much detail about
NSEs/PXF and IPv6 performance.

e.g. GRE is stated as being limited to IPv4 for PXF processing, but
does that mean that traffic for a  tunnel config like this would also
get punted to RP:

interface Tunnel1
 description native v4-over-v6 tunnel
 ip address 10.72.10.1 255.255.255.0
 tunnel source GigabitEthernet0/2
 tunnel destination 2001:1:1:10::2
 tunnel mode ipv6

It's not GRE, but it is IPv6...

What would be the best way to tell whether the beefier RP of the G-100
would be better suited to our v6 needs than the application-specific
PXF?  Is the G2 actually even beefier than the G-100?

(G2 claims 2Mpps, 1.8Gbps backplane.
G100 claims "more than 1 Mpps", 4.0 Gbps backplane...
I couldn't find NSE-150 pps claims for RP traffic, just that it was
"greater than the NSE-100)

Thanks,
     ~Aaron