Thanks again Smooth. It's the warranty issue that has kept me dithering on which place on Ebay to buy from. Some do offer an international warranty and some a sellers warranty where it has to be sent back to HK. I am emailing each of the companies to verify their warranties before purchasing.
I know the EOS 450D is a new camera and so haven't eard anything about reliabilty etc so want the internatinal the warranty for sure.
EOS 450D, Sigma 8mm F3.5 EX DG, Manfrotto 190XPROB