Parts availability is key, especially in Australia. But, to throw another opinion in here, if money is not a concern, i'd suggest waiting for the MRX5. Mugen's are strong which is great for a beginner. Plus, one of the design concerns for the 5 was easier to work on. As a beginner, you don't want to spend half your race day changing a belt. You need to be out on the track learning how to drive and getting the suspension/motor set, so the easier to work on, the better. Just my thoughts. All the other cars mentioned here are great cars but, parts, ease to work on, and strength are the most important factors to consider as a beginner in my opinion. Hope that helps.