As for the same amount of $$, which is better for a busy, DB intensif site (such as forum) between this two?

[list=1][*]1 Server, Dual Xeon 2.4, 2x73 GB SCSI (RAID 0), 2 GB RAM, 2000 GB Bandwidth[*]2 Servers, each P4 2.4C, 73 GB SCSI, 1 GB RAM, 1000 GB Bandwidth[/list=1]