I don't think you are going to go wrong with Dyson/Miele, and the Sebo
My mate has Miele everything, it actually works no better then either of the Dysons I've had, and needs bags, but is very quiet..
I bought an original DC01 Dyson after borrowing one, it certainly did a superb job of getting car hair out of the carpet.. I only replaced it when it had an accident whilst moving, and that was a DC15 'ball'.. which too has been brilliant so far, and works well with pet hair..
I'd try a Sebo though, it seems to get good reviews, not sure how much better then removing all visible car hair then the Dyson it could get, and my Dysons have been exemplary in terms of reliability..