I say S4 as well. I'm over at the Audi/Porsche dealership at the very least once a week for my job. The service they give there is absolutly amazing. I'm no sure about Subaru or Acura, but I don't see how it could get any better. They don't give you a hard time about anything, they're extremely helpful when it comes to the minor things that Ford has issues replacing or fixing and things like that. I say get the S4 and throw just a little bit more money into it. You will not be dissapointed!