Bhai G, my honest and humble opinion for you is that don't change the stock tyres of ur car. Euro star hotay to baat thi because in case of those, kiss your drive comfort good bye. Secondly, you can't trust eurostars from the factory because they're purchased in bulks and stay in storage spaces for prolonged time periods in conditions that aren't even close to optimum.
Your case is a bit different, the tyres are imported, not locally made and they are much better, well technically, any tire is better than eurostar, lolz.
The extra 30k expenditure is pointless. Stick with these tyres for as long as they last. If you aren't a keen observer or extremely nazuk mizaaj, you won't feel much difference between turanza and dBs.