Infiniti G35 or Mazdaspeed 3?

Hi I'm looking to buy a car and am trying to decide between a '08 or '09 Mazdaspeed 3 and the 06-07 G35 coupe. Any input would be helpful, and I would really like to know about the handling on each of these and how they compare. I know they're completely different cars but I'm really stuck. Thank you.