Thank you for your kind words, and glad you enjoy our work! Given your budget and your requirements, the best option from your shortlist is the Mahindra XUV 3XO. It is the best to drive and offers a choice of punch turbo petrol and diesel engines. Besides this, it has very comfortable suspension too, which should serve you well on long highway journeys.
While the petrol version is not the most fuel efficient, since you're looking at the diesel manual, so you should be fine on mileage. The only downside really is that it has a relatively small boot, and it's missing two of the features you are looking for - powered and ventilated front seats - but our advice is to still stick with it, as the rest of the benefits are too good to pass up, for your kind of usage.
As for your other choices, with the Kia Seltos, at your budget, you won't get those features either, and in fact, the specification will be quite basic. The Renault Duster could be a good choice, but until its launch in March, it remains an unknown quantity. We will only know at a later stage how it is to drive, how comfortable it is, and what its price will be.
