I looked it up; I have an Onkyo dx5500 that has never been plugged into a dac. I don't even recall a dac available to buy in 1989. Today Music Direct and Cruthfield both offer the PS audio Digital Link III. Probably mid-grade for an uneducated guess. My gear plays good, so I have time to learn and shop during this upgrade. The JBL L166 and 4 Advents stay. 5000 LP's and 1000 cd's stay. I've had the ipod classic for 5 months and I have not found it easy at all. Yet, once working, it will play for hours without operator action. I like that. How much to spend? I don't know. I have more money than stereo knowledge. The McIntosh dealers in Tustin and Pasadena are unimpressive. Actually marginal product knowledge is more accurate. That Wadia purchase at Music direct is an easy purchase. Todate, I would consider McIntosh, Naim, Quad, LFD or Bryston. Guys, I really don't know what is appropriate.