Dunno bout y'all in NSW buttt...we here in Victoria arent allowed naturally aspirated high powered 6s either - they have a shortlist including M3s, 911s...and the 350 and 370Zs.
Personally i had a lil Pulsar sedan for the entire 3 years i was on my Ps. Get an N16. Its designed to accelerate quicker and work better in lower rev range. redlines at 6500. I had the 1.8...good fuel economy, a lil bit of fun on a lil budget *shrug* you could probably pick one up for 10-14 grandish?
Also, 55 000 kms? not going to be likely for most of the cars youre allowed to drive - even if you can throw money around like a millionaire. I got my full licence and upgraded to a GTR. Had no problems at all with the transition.
After 3 years youre a better driver - then you can have a better car.