Thx guys, for all your comment, it does give me some idea!
I went down to the rc club track today and talked to some ppl there, they said that most of ppl there using V one S III , and they said it run a little bit better than FW05 s coz it is shaft drive!
I found one in japan kyosho website, they are selling fw05s cup edition 2, it include GxR15 , vone RRR shock, better header and muffler, at around $480 shipped to melbourne! at the same time v1s III cup edition is sightly cheaper!
Regarding to the FW05T , I wouldn't go for that one, coz it made from china and the engine is not as good as Gs15R...( ppl comment on other forum).
the things I am worrying is I would like to get one with better classis! so in this short period of time I wouldnt bother to chang another car. and I can learn bits and pieces for tuning over it!