Thanks for the new designs. How about this:
1) We want "nou" to stand out more than "Systems" - can you try lower-case "s" in "systems"?
2) The vertical "INC" is great - and keep that gray or de-emphasized
3) oval image is better than the round
4) color scheme in #22 is good (again, de-emphasizing "system" and emphasizing "nou")
5) Could the symbol "nsi" be opened up / widened a bit to avoid the overlap of the n and s? we like the overlap - it's well done with either color or relief, but we're curious how it looks without the overlap.
6) Finally, can you experiment with some "nou" graphics instead of NSI? There is some interesting symmetry there between the n and u.