Great start! I actually prefer the font in entry #1 and 2 the most, but the abstract symbol in entry #3 seems the most most 'science-like' so far, so thats why I've ranked it 1st.
Thanks! I'm going to get my boss to weigh in tomorrow and will have some final feedback for you. I think I'm leaning towards number 3 or number 6 actually.
My boss likes entry #6 the most so I've re-ranked it as number one. Not sure how I would recommend improving it even more since it's great as is. If there are any variations you can think of, please feel free to suggest.