Sure a server improves upon the ol' transport reading the spinning disk. But those hard drives fail, sooner or later. Why would anyone plunk down $17K for a lovely device based on what is inevitably a short-lived storage medium?
SSDs are quieter, longer-lasting, faster, more reliable -- for the price of a good used car, I would insist on SSDs in my server. In fact, my Musica Pristina server IS based on SSDs!
Michael