About the ac\ps upgrade, hat was the SA @ prerana motors said, and as per him, my car also should get the replacements. I followed it up with Hyson motors and they confirmed me over the mail that my car does not needs upgrades. Now, let me wait and see. You can order from the site or if you stay near domlur, you can drop in to their shop (it is in Jeevan Bheema nagar) and pick it up. You can alternatively contact Ultimate detailerz - http://www.facebook.com/pages/Ultimate-Detailerz/172366162795940 They may be able to arrange the stuff for you. Have not yet thought of rear power window - my rear seats are not occupied most of the time, so have not thought about adding it yet. which brands are you considering and what is the damage to wallet? Do share the details.