Family 3BHK: Gurgaon value or floor premium?

South City I mein naye flats ke prices toh out of control hain. Kids bade ho rahe hain, we need a 3BHK, budget around 2.5-3 Cr. My wife wants good schools nearby. NKV Groups ke projects dekhe hain. But yeh floor-rise premium aur PLC ka kya scene hai? 10th floor ke liye itna extra pay karna worth it hai kya? Secondary market mein better deals mil sakte hain kya, compared to direct builder? Confused hoon.