For those of you who are looking for an alternative to higher prices NAS drives supplied by Dell and HP.  I would take a hard look at the Disk Station 509+.

Synology Disk Station DS509+ offers PC server equivalent performance for efficient data sharing and backup. Its high performance coupled with sophisticated Synology Disk Station Manager 2.2 provides an ideal solution for cross platform sharing, secure server backup, Windows ADS integration, business mail server, and corporate surveillance. The plug-n-use Synology DX5 easily expands the DS509+’s storage capacity up to 10 hard drives on the fly.

• High Speed
  39+ MB/Sec RAID 5 Write
  55+ MB/Sec RAID 5 Read
• Hot-swappable HDD Design
• 2 Gigabit LAN Ports
• Windows + Mac + Linux
• Power Saving (30W~69W)

I purchased two of these NAS Systems recently.  One as an onsite backup and the second as an offsite backup.  I stuffed 4 1 Terabyte Samsung Drives(HE103UJ) in them and set them up in Raid 5 mode.  This gives me about 2.8 terabytes in space to backup my servers and local workstations.

The Synology Systems are able to be brought into a Windows Domain which is perfect for what I needed.  They also provide a network backup solution that allows you to backup one Synology Server to another.  This was really easy to setup.  I would highly recommend purchasing these devices as a NAS Backup device.  Once I test them out more I will let you know how the media and ftp servers work out.

My Setup

Synology 509 +

FIOS 25/15 (I get 25/25 to my other location)

The Onsite Synology is connected to the second Synology through a VPN.

The second Synology Device is on a FIOS 20/5 Connection.

I average about 2.2 Mbs transfer rate between my two buildings.