Ghaziabad builder choice: Gaurs, ATS, Mahagun for family home?

Okay I'll be honest — buying a 3BHK for my growing family in Ghaziabad feels more complicated than I thought. Hum Indirapuram ya Vasundhara mein dekh rahe hain, budget ₹80L-₹1.1Cr tak hai. Kids ke school admission ke liye time pe possession chahiye. Gaurs, ATS, aur Mahagun options mein hain. Suna hai Gaurs ki delivery track record theek hai, but construction quality कैसी है? ATS ke projects premium lagte hain, par kya woh time pe dete hain aur resale value kaisi rehti hai? Mahagun ke prices sahi lag rahe, but after-sales support aur build quality ka kya hai? Family ke liye long-term investment hai. Aapke experiences kya hain, especially Ghaziabad projects ke liye?