Aoa, what about investment in F-17 what you expert guys suggest?
Also tell the better societies in Zone-2 except B-17.
Http://www.zameen.com/forum/discussions/buying_property/v_sign_of_zone_2-6296.html
This might help you to close down your options.
All CDA sectors will eventually develop so any investment in any of CDA sectors promise returns in the longer run. For other housing projects, Air Avenue is also promising.