There's no point in getting a Mac unless you feel like throwing away money. Okey, might be smart if you were using final cut pro or anything else that only runs on os x. Though, you won't have much luck with 3ds max on os x.
Obviously, i7 would be ideal because of its hyper-threading but I've no idea what the prices in India are.
If it blows your budget an i5 is totally fine as well.
As for the motherboard, you can't go wrong with either Gigabyte, MSI or Asus.
4 gigs of RAM are fine but 8 is better.
5750 is all you need.