Well.
I used NLS, used TB, I have also Nebula and many others (like SK). And I have one conclusion: the MAGIC happens way before those plugins. It's in the melody, emotions and composer's vision. I have lot of mixes that I love and they were made completely ITB without those plugins. They were made using some not-the-state-of-art compressors and eq, but there was a vision. and this vision shines.
But If I could advise - Nebula sounds great, but it will eat all resources you've got. It can be frustrating. NLS is fine, but don't drive it too much - it can ruin your mix if you overdose. TB - quite impressive little thing!
SKNote - nice but use with caution. Satson - I haven't used it (much), I don't have an opinion.