wow, you don't already have a laptop ??? just about essential nowadays, especially in Hong Kong...........but if you want to buy one, wait till you get to Hong Kong as you'll find that HK is about 2 years ahead of the rest of the world in computer technology and importantly CHEAPER !!! Most places in HK now have wireless internet access etc etc. You won't need a laptop for your course etc and three weeks CBT will be enough computer time to p##s you off for a while but check around and get "Vol 8's" as these will give you all the questions and answers you need. When you join you'll also get a sign on for "IntraCX" and you can access this through your personal computer via "i-connect" but most crew hotels have a Cathay computer you can use as well !!!
hope this helps
Good luck