Can anyone recommend a good streamer/DAC?

I have tried streaming on an Astell& Kern Kann Cube and love it. Now looking for a streamer DAC combo (or  both integrated in one box) to put on the rack with my living room system. I have read good things about the Cambridge Audio 851n and their CXN v2; $1,500 and $1,100, respectively. Also about the Bryston BDA-3.14, at $4,200. I am willing to pay for good quality sound and at the same time I worry that the technology may be moving fast enough that as with computers and HDTVs there will be a much better version available soon for a lot less money. Anybody know if Cambridge Audio or Bryston has anything new in the works for streamer/DACs? All recommendations will be much appreciated.