have a look at this site
www.rcformula1.com.au it is based on the australian f1 racing scene for our local tracks,full of usfull info
also have a look at what ppl are using at the tracks you will be racing at & ask queastions most folk are very helpful
as has been said there are plenty of f1's on the market now,the choice is not as easy as it was 2 years ago
good luck, its a growing & great class of racing