I dont know what to think of the ones on black... I like the concept of the people... and the use of color. Against black... my biggest concern is how viewable it might read. I think I like the one with the red star batter... and the "having an advantage..." part might need to be bigger.. more emphasized. I dont know.
Regarding your main page question, I'm a senior designer with 7 years of experience, in both in web and print design, and we can develop a business relationship after this logo design project ends.
I like this one a lot... but I am still thinking it needs some work. It is almost too much color variation. I dont know. I am still hoping for some adaptation on it. It's still really hard to read the slogan... darn thing is so long.
The circled line with the star, symbolize the elite/professionalism, and the people the team.
The logo will be provided to you as an eps (vector file)- on the site for your approval.Then when we have changed contact info, you will receive the files on any format or sizes that you might need.