Difference between Cambridge Audio CXN and CXN V2 and other Network Streamers

So I am looking for a Network Streamer and the Cambridge CXN and CXN V2 come up.  From what I read the V2 had updated processing power but when I compare the two the DAC and Analogue filters are the same.  Is it worth the extra $300 clams to go with the V2 or get the CXN and look for a separate DAC (a Schiit or something).  I do see the Azure 851N is a significant jump with two DACs and is CA's premium streamer.  Also throw in the Oppo Sonica, is it a fair comparison to the CXN variants?  Anyone have any experience or insight with these network streamers.