toyturbo I am going to tell you what most people would tell you. Buy a product that you can get parts for easily either from you LHS or from on-line at least, but mostly your LHS. Personally, I would go for the Serpent dude. That is one sweet ride. It is a real racing machine...... Now, you may want to take a look at
http://www.technokit.it/inglese.htm I don't think that they make a 235mm car but you may find something of interest. Awesome workmanship, awesome!