The suggestions to look at the Ayre amp/preamp combo are good ones. I would also add the Bryston BP-25 preamp to your list, with either the Bryston 3B-ST or 4B-ST as the amplifier. The numerous audio mag reviews on Bryston's products can be read at the following Bryston Web site:
http://www.bryston.ca/revprod.html
Best regards.
http://www.bryston.ca/revprod.html
Best regards.