Good iphone car mount that works with case?

a bit more expensive but the best option: http://www.proclipusa.com/

I use the Arkon Universal PDA mount. It will fit the iPhone with or without a case. I use it naked for local trips and encased in a Mophie Juice Pack Air for longer trips. http://www.arkon.com/pdamount.php

Griffin makes an FM/lighter mounted model, which has several bottom mounting brackets, to fit several phone models. I tested it out today, but the ipod buttons on the model don't work correctly, and FM was spotty to awful, as always on these type of setups. It did hold my naked cellphone well, and wish it had worked as advertised - cost about $100 at Best Buy.

Belking has a similar model (about $70 at Best Buy), without the FM transmitter, also on a lighter stalk, which may work, since it grips the top of the phone with a wider clip, made to adapt to case thicknesses, I presume. I have not tried out this model, but may do so, since I have never found a single FM transmitter that works well - too much static, fading in and out, etc.

Is there anyone who can recommend a lighter mounted (on a flexible stalk) charger for the iphone, that has a stalk long enough to accommodate any rental car, I would very much appreciate it.

Kensington makes a mount that I have been using for three months (http://us.kensington.com/html/16293.html). It accomodates the case or the naked phone with a racheting system. Works pretty well for me.

Forgot to mention that I tried a Griffin Roadtrip bought from the Apple store, and it worked beautifully, so apparently, they have the latest models with the updated software. I have also ordered one from Amazon, so will let you know if it doesn't work correctly.