Last time I went to Willowbank the timing was appauling and the karts were a bit fuxored... ie bald tyres, no brakes... Track is nice though...
LeMans suxs...
MSI is pretty good... Timing is excellent, Track is good fun, Facility is well set up... My only complaint would be that the karts are fairly disparate in performance...
Parklands on the Gold Coast has some seriously fast 2strokes and 1 hell of a scary track but I'm not sure if they do events...
Haven't heard good things about Big Karts (or something) up northways...
No experience with any other tracks...