Window tinting, best brands?

I'm getting my windows tinted this week and I was wondering what is the best brand to use? A friend of mine told me either solar something or other or 3m, but the guy I talked to at the shop told me that the 3m is the one that turns purpley color when it fades. They use something that starts with an "M" I think (I'm so great with names, sorry...)

Any ideas? What would be the best for me to work with? I want a nice dark tint, without turning to colors, gray or mirror. I just want something that hides my screens.

Thanks

KK

www.tintdude.com
There are a few good brands, make sure it has a "lifetime" warranty.