I have a Home Server because it is cheaper, faster and more secure for back-ups. I got tired of buying external drives, having the drives fail and the laborious back-ups. Even tried eSata, but even Seagate tech support said that their eSata connection doesn't
really work. So I slapped together a server box with two 1.5 TB drives and now I have a Home Server. With the mirroring of the hard drives, data loss is unlikely. You can back your WHS to all of the external drives you wont need anymore!