What you would recommend?

Hi everyone me and one friend like to go on touge through Italy, and we're starting to taking more seriously we want to go more fast he wants to take a fiat 600 and do the basic to go fast and he said to me what if we build two 600? And it will be nice, but I always had a crush for bmw E46 320d what would you Recommend for touge? Should I get a 600 or a E46? And why?