Investor's dilemma: Gurugram 3BHK upgrade

Budget finalised, loan pre-approved — now stuck on which sector. Currently in a 2BHK near Hero Honda Chowk, thinking of upgrading to a 3BHK or even a villa. Dekh raha hoon Golf Course Extension Road aur Dwarka Expressway projects, especially Sobha ke. Prices high lag rahe hain yaar. Does price negotiation actually work in Gurugram? Kitna realistically knock off kar sakte hain? Builders bolte hain fixed price, but I'm sure kuch toh scope hota hoga. Aur pre-launch offers ka kya scene hai? Sach mein discount milta hai ya bas hype hai? Often end up paying PLC ya floor-rise premium anyway. Payment plans mein bhi confusion hai – CLP better hai for an investor ya down payment? Already have a home loan, so cash flow manage karna hai. Any advice on getting the best deal?