Quad Xeon vs. Dual Itanium

Hi, all.

I need to upgrade my dual Xeon PostgreSQL engine.

Assuming similar memory and disk sub-systems, I am considering a Quad
Xeon system vs. a Dual Itanium for PostgreSQL.  I believe that the
PostgreSQL code is written for 32 bit and not optimized for the 64 bit
Itanium cpu.  That makes me think that the Xeon system would be a better
choice.

Do any of you have thoughts on:

1. Straight performance capability
2. Price/Performance


I would appreciate any feedback you might have.


...john