personally i like the biturbo because you can get a second hand one cheap. but is it the best ? no way in hell.
your best would be a custom. normally you have 2 choices in the states for mopeds motomatic who has been in the game longer but likes to put higher power bands on pipes and motion left who is new to the game but builds a wonderful pipe for daily driving with good low end and alright on the top. drag racers and top speed kids like motomatic. daily driving in the city I'd take mlm. daily driving in the country where it's all about top speed take motomatic