Flat for rent in islamabad?

I was approached by a newlywed couple seeking a flat for rent in islamabad recently. I need local experts’ advice on which neighborhood will be best (facilities and rent wise)? They don’t have any specific location in mind so any family flats for rent in islamabad would do.

Please consider the following options.

F-11 Appartments in front of F-11 Markaz.

F-10 Residencial Appartments.

G-11 PHA Appartments.

DHA Phase II - Askari Tower’s

Any success?