New streamer? N150 vs U2

I own the N150 and Node w/PD upgrade.  No experience with Lumin.  Don't currently own but have had the Qutest.   No question the N150 is an upgrade from the modified Node.  Will you hear too much difference with the Qutest.  I didn't.  IMO you money is much better spent upgrading your DAC first.

@txp1. Congrats I think you'll be very happy.  The 150 is at my vacation house so I'm doing this from memory but you'll use the vertical USB port.  The other USB ports are for data (outside drives, etc.)  My initial suggestion after the unit breaks in, which you can use a printer cable for, would be to use a good USB cable.  I tried 3 different cables but ended up with the Cardas high speed cable. Whatever you try, give the cable ample time to break in as you will hear subtle changes for the first 100 hrs or so.  Differences in the cables will also be subtle.  I happened to like the Cardas as it seemed to smooth things out a little more than the others particularly with the Qutest, without loosing any of the detail. 

I tried the Carbon coax and liked Cardas more.  But then I'm a Cardas guy :-)  i've used Nordost as well but didn't care for it.  Pretty much the opposite of Cardas.