I love it ! It is really pleasing to see beautiful works especially from beginners / intermediate in this area !
We all remember how things looked with vray at novice level :) Although, I more believe in personal's "eye's" capability to "see" like a PRO, rather in technical/software part of the process.
In my opinion - stick to a single HDRI map or play which a sun position.
The reason is that I don't think there are any direct sun light in you'r reference image which is important point if you want to stick to the lighting and mood.