FWIW and not sure how much you've worked with these old Xserve boxes, but a Mac mini with a Thunderbolt storage array is probably as fast as that old Xserve if not faster given the newer I/O speeds, is less complex to manage and with much newer hardware, and is far less loud than those Xserve boxes get. At middling to full fan speeds — and you will get there under load and as the dust builds up in the cooling air passages and as the Xeon processors warm up — an Xserve is a noisy box at 7+ bels IIRC, and not at all suited for use in an office or home office environment short of acquiring and installing it into an acoustical enclosure or a server closet. A Mac mini can also easily push a typical network connection about as fast as most folks have bandwidth for, too. Also runs cooler. This from experience: ran an Xserve for some complex web content management systems and hosting some years ago, and replaced all that with a Mac Mini. Again, entirely FWIW.