general hardware question -- compatibility issues various P3

Tue May 10 22:32:24 PDT 2005

I need to pickup a dual processor P3 machine to run FreeBSD on and I  
would like to check quickly please if any of the following have known  
compatabiliy issues with either 4.x or 5.x FreeBSD:

Compaq DL 380 Gen. 2
Dell 2450/2550
HP LP 2000r

Most likely it is one of the first two (that list is in preference  
depending on deal).

Thank you in advance for any help -

Best,
d.