Hello, I am a proud new owner of Prius 2010. It came with the original factory tint, but I live in Austin, TX, its not enough. I want to buy the best tint that can block out heat/light? So I thought I would get yals opinion. I know it would help with MPG, if I could cut the AC down. I don't want to break the bank, but want a good quality tint. Also, I assume the original tint needs to come off before the new goes on.....? Looking forward to yal's suggestions