Thanks to all with the advice.
Garry the bonus there is I don't have to wait until June to buy as there is no GST to claim on the travellers rebate scheme!
Wow Kym, that's quite a lens collection you got there. Obviously you rate the Sigma and Tamron lenses highly?

JM Tran, the Sigma 17-70 f2.8-4.5 sounds like a nice lens, Unfortunately B&H have nil stock at the moment.