Pokertracker, PAHUD, PosgreSQL, = Do I need a faster processor?

[NU Star]

-I recently upgraded from 512MB or RAM to 2GB of Ram
-I recently set up PAHUD to work with Pokertracker, which I run with a PosgreSQL database.

Right now running all this is taking up an average of about 99% of my CPU and overall the system is laggy. What do I need to improve performance? It looks like PosgreSQL is taking most of the resources.

-Faster processor? (AMD 64 3700+)
-More RAM?
-Better video cards? (running 3 1600x1200s monitors on 2 dual DVI cards)
-Different software setup?

Sorry if I am stupid.