This a newly announced lens. It got a very good first-impression review from Roger Cicala (LensRental). It even scores better than Canon 35mm f/1.4L lens.
Link: http://www.lensrentals.com/blog/2012/11/sigma-35mm-f1-4-arri…
Since this is an Australian stock, GST is included (thus claimable) and local factory warranty.
I'm a tightass
I would rather go for a much cheaper F/1.8 version instead