Buy in Canada or China?

Don't know if this is the right place or not. I may be moving to China this August and it's time to buy a new Mac. My trusty iMac snowball is still kicking ***, but I yearn for faster, better, and all that rot. My question is whether to buy a new iMac in Canada and take it with me, or buy one in Hong Kong (I'll be living very close). Anyone know which would be better: cost-wise, etc.?? Thanks for any help! And, the same goes for a new MacBook (my daughter).

Judging by the prices on the Hong Kong and Canadian Apple stores, its cheaper to get one in Cananda