Is it Worth the Upgrade

Hello,

I currently have a PC with a P4 Northwood 2400 MHz, overclocked to 2700 Mhz.
I use my PC to do a lot of number crunching, like audio coding and decoding.
I am trying to figure out if a newer faster PC is really worth the upgrade.
I have my eyes set on the Core 2 Duo, yet I do not know what performance
advantage I can get over my current system. Can you refer me to benchmarks,
that compare the older Intel P4 CPUs, with these new Core 2 Duo? Thanks.

Since you will end up excessively crossposting this Q until
you buy a new PC, the answer is yes it's worthwhile and yes
I can refer you to benchmarks.. but I'm not going to
because you can do your own web searches.