3.5 million per to invest

Hi

I am looking to invest 3.5 million in purchase of residential plots in and near to islamabad. Can i have some steer regarding which are good places to invest with a good return over 3-5 years.

Some places that come to mind are:

B17 block e
I-12
Mumtaz city
Top city
Faisal town
F17
D17
E16

Looking to buy 2 plots in 35 lac, one maybe of small size