CPu Questions

[Darryl Hoar]

Greetings,
Looking to purchase a server that I will run Freebsd on.  It will be a
FAMP server.   I am trying to decide buying used or new.

Used server has (2) Xeon 2.8GHZ processors with 512K cache.
New server has Dual Core Xeon 1.6Ghz with 4MB cache and
1066 front side bus.

In a smaller environment (50 users) will processor selection make
any real difference ?  Website with some simple php scripting and 
mysql databases tied in .

thanks for any advice,
Darryl