Entry #2 is very interesting. A little darker green would help (Dartmouth), I think, but what you have done mirroring the arc of the P and the arc of the S is striking. It is a people business after all. I like it more the more I look at it.
For entries 3, 4 and 5, I think the mark itself is just too complex. I am having trouble seeing the letters and wonder if less abstract would help or, to go the other way, if a symbol not associated with the letters might be better. I do appreciate the purpose you have written but I have decided to not to include a slogan in the logo. I don't want to constrain the business too narrowly. Thanks!