I just purchased an OWC Mercury Extreme G4 1.47GHz CPU Upgrade Card that uses a 7455 processor (to replace my 1.8 GHz 7447).
I will post my CPU/memory results in the thread I posted my 933MHz and 1.8GHz results in.

I'd like to see how this processor (in a Quicksilver) compares to a 1.42GHz MDD and to 1.6 and 1.8 GHz 7447s.

Hi Jim, I would be happy to run test software to give you benchmarks from my recently upgraded dual 1.25GHz G4's, now running dual 1.42GHz G4's MDD PowerMac. We could also post the results in the challenge thread I started on A.org.

Just let me know what software tests you want to use to measure performance and I will download, install and run them and send you my results. I have zero experience running any kind of benchmarks for measuring performance on any computer.