PB Upgrade Worth It?

Hi all,

I currently own a TiBook 800 with 1GB RAM. I use it for, well, everything. But the reason I am considering an upgrade has to do with development. I do Java development and also run an instance of the Firebird database (the OSS spin off of Borland's Interbase product). I've found that during testing, the database performance is quite bad compared to the performance of a recently purchased PC laptop (please don't ask why we're developing database apps on laptops).

Now I understand this can have as much or more to do with tuning the database for the specific platform its on as well as OS specific code in the ports as it does the hardware I'm running on, but as I'm considering an upgrade in any case, my question is:

Will upgrading to the current 15" (1.5 Ghz G4) with 1 GB RAM help much at all in this case?

I recognize that databases are typically I/O bound. That said, given the bottleneck on the speed of the bus to the RAM, how much help will the increase in CPU speed really afford me?

Thoughts? Comments?

Thanks,
Lynn