I've only been to few here in Oz where I've actually ridden my own bike on the track, ( otherwise being a team-mechanic ), but they've all been lots of fun, irrespective of their "stature" in racing circles. I hope you don't mind me posting.
Philip Island = Obviously a world class track, but sadly, makes any bike feel slow...
Broadford = Surrounded with a natural ampitheater of hills in Victoria, this short & twisty track really tests yours, & the bikes stamina.
Oran Park = Sadly, this track has made way for developers in Sydney's West, but I preferred it's technical dynamics as a track to Eastern Creek.
Mac Park = A novice & rough track in South Australia, but still has it's own qualities that makes for a great day out. Very affordable, & great for testing new kit.