Upgrading 3BHK: Floor-rise premium confusion

Since last Diwali, I've been eyeing 3BHKs in Gurgaon, especially Golf Course Ext. Currently in a 2BHK, thinking of upgrading. Builders like M3M mein floor-rise premium aur PLC kaafi lag raha hai. As an investor, is this extra cost justified for capital appreciation? Ya secondary market mein better deals mil sakte hain?