Yeah, I've got a quad dual-core Opteron box. The processors aren't cheap, but since these are "enterprise servers", the manufacturers more than make up for it. Only a fool or a gamer would pay more than $2000 for a box, but corporations think nothing of shelling out $20,000 for one. Four dual core Operteons, 16 GB of memory and a 100 GB hard drive with two piddly performance Intel Gb NICs.

100 GB! What is this, a mid line laptop?

Most custom system builders just throw in a hard drive for base systems. If your looking for a custom builder to say throw in a 73GB 10k SAS or SCSI drive for a base system, then dream on. Those drives cost ALOT of money while SATA drives can be bought in bulk for pennies on the dollar.