My 2BHK upgrade: Questioning Ghaziabad's top builders

Visited projects last weekend in Siddhartha Vihar. I'm in a 2BHK Vaishali, thinking 3BHK upgrade. Gaurs, ATS charge premium, but is it justified? Honestly, finishing quality post-possession (plumbing, cracks) often disappoints. Delivery delays are common. Kya Mahagun ya Gulshan better for actual quality and timely handover? Change my mind.