#1, Rocky mountain Tint in Livermore is famous for doing great quality tints. Lots of Bay Area fanatics, including myself (3 cars done there) are extremely impressed with the work. I would definitely recommend there instead.
#2 I got 30% huper all around on my 330i for $400.
#3 My wife got pinnacle ceramic on her 325ci, and it's a much better alternative to huper. Huper is thick and produces a "flaming" effect on the rear window since it's hard to stretch. Pinnacle doesn't have this problem and have the same heat resistant characteristics as Huper. Huper is designed for storefront windows, Pinnacle is for cars. I would get Pinnacle instead. They cost about the same.
You're welcome to check out what they look like on our cars.