#16 and #15 are great, I love the city skyline and incorporation of the tree. It is a bit too colorful and I would like to see it simplified, maybe more of a silhouette, I would like to see the shaded box around Nashville removed.
# 22 I love the elegance in this, not sure about the NR in the middle but I really like it, how could we incorporate color? Maybe softer blues, I love the grey!
Thanks for your further feedback. The NR is my experiment to find out if it can make the logo difference. I will come with other version without NR on my next submission.