When I went to HK a few years ago, I hired a Mercedes S class via the hotel to pick us up and drop us off. I was wondering if its possible to hire a town-car type service in HK and if its expensive?

Even if it is too expensive to hire a car service all day, is there some discount airport pickup services just to and from the airport to hotel? Something better then a taxi but doesnt need to be a top of the line RR or Merc.