Fed up of renting! TechZone IV flat...help me decide

Landlord raised rent *again*. Seriously considering buying in TechZone IV, Noida Extension. I'm torn between two options: a ready-to-move 2BHK near the metro, or a bigger 3BHK that's still under construction. Ready-to-move means EMIs start immediately, but resale bhi easy rahega if needed. Under construction is cheaper now, but possession dates are always risky, right? What does everyone think? Which would you pick?