Acura RDX or Infiniti EX 35?

I have 23,000 to spend on a used car. I like the EX 35 and RDX a lot and can get a good deal for the 2008 models with no more than 50,000 miles on each, but less with the RDX. I am wondering which one is more reliable as that is very important to me. I am also wondering which one is faster and funner to ride, and the best overall vehicle. In the Acura RDX do you turn on the turbo or is it always on? Lastly which one would probably use up less gas.