I have now decided through tons of thinking and asking around, that the best location should be somewhere in the Pacific coast, therefore OAXACA is the best for several reasons:

-Theres a wide variety of hotels, from cheap hammock huts to 5 star hotels
-Its not disgustingly full of people like Acapulco or Cancun
-The ocean is clean (dont ask)
-Its superb for surfers (especially around november)
-There are loads of places to go to, like the mangrooves, archaeological sites, beaches, etc (check out the link I provided for a detailed list of things Oaxaca has to offer)

Think about it, you can use the trip as a whole vacation, btw when should the meetup be?
This is not my terminant desition though, and I am still flexible to any suggestions.Also I could use a hand or two to help me with the planing and stuff.

So what do you people say?