I think that youall bring up some really good points to think aobut.
However, everyone seems to be in agreement that one has to be very careful in making any decision.
As I posted before know of a situation where a college player was being advised by an advisor/agent. The college coach was dead set against the player using this individual and advised him that in his particular case he did not need to pay anyone 3-4% later for that advice. The player took that advice, was drafted and later signed with an agent only for a small yearly fee to use his services. I tend to agree that most college coaches do not care for most advisor/agents when dealing with their players, especailly the ones who will be drafted in late rounds.