Any Emm LABS DV2 owners who can share what streaming unit they paired with the DV2...Any input will be appreciated...John
“Do you have the EMM REF preamp?”

Nope, I am currently using Shindo Monbrison preamp. 
The N10 and NS1 are different products.  An alternative to the N10 might be something like the Innuos Zenith MK3 (with Innuos Phoenix) and an alternative to the NS1 would be the dcs Network Bridge.  There are a lot of options out there in the market but those two seem be getting most of the press.  I wouldn't know personally as I'm set with my transport (no streaming), but never say never.
I realize they are different products, just attempting to gauge the sonic differences between the units...Without a listen its just guess work...Have you heard both units? The NS1 performs well...I understand the tech. differences, just curious...Expensive hobby, one learns to research all the aspects before buying the cheese...
Couldn't tell you. 

Something to think about is why do you want to try other gear if you think the performance of what you are testing is "wonderful".  The grass is rarely greener in my experience.  
Lalitk, I'm running the DV2 directly to my Classe' CA M600 mono blocks,,,I do not have the REF PRE AMP, I did try using my Classe' Sigma SSP pre amp...Didn't like the veiled sound of that combo...I'm always attempting to improve SQ...Still curious how the N10 compares to the NS1...I can still play Hi Res files, and DSD...I assume you are using USB?