Definitely go for Quadro because you are designing, specially 3D. Don't even go for GTX 590 because that's more for gaming. nVidia Quadro series are just for designers like you. I've seen many designers preferring Quadro. And ya I'm too from India.
I use a Quadro all day every day at work however I STRONGLY suggest you comply with the requirements of the software you are using. If you don't, their tech support people will constantly tell you your problems are GPU related and you can't prove them wrong.