My favorite retailer has the FUJITSU PRIMERGY TX100 S3P E3-1220V2 with 2x4GB ECC RAM and 2X500GB HDDs for ~$600USD.
For the same price however I can build a white box with the following specs:
Intel Xeon E3-1230v2 (with Hyper-Threading!)
32GB RAM (non-ECC)
Gigabyte GA-B75M-D3H
CHIEFTEC...