Tints...
The best - Vkool or Huper Optik - Expensive As well But the highest heat rejection. These are ceramic films.
3M - Crystalline is a good film, good visibility, reasonable heat rejection - Very expensive in Pakistan
3M Color Stable Film - My last choice for tints.. Hardly any heat rejection.. Looks like the plain black colored film you get from Plaza in karachi - However since its a 3M product, its got a non fade and non scratch warranty. Reasonably priced.
Pricing will depend on Car Type & Material Used.
Guys you must remember a darker film does not mean its stopping more heat. Sunlight Consists of Visible Light, UV & IR. Dark films block light, absorb heat and allow for IR transmission.
Ceramic or Spectrally selective films are clear, do not block light, but due to their construction reflect all the IR which causes heat.
Hope this helps.
My choice is SunGard USA, very reasonably priced, 10 year non scratch and fade warranty. Large variety of shades and heat rejection available. We have used it on over 60 vehicles not one has had a problem with the cops or fading etc.