I have owned all that you mentioned and even the jammin that others mentioned...
the best ones are the B5 and the plus 4
both smooth both awesome runtime
b5 pipes dont really matter and its a 150 bucks cheaper with better support and service, Nova good motor as well but limited to certain pipes to get the max performance out of it and not as good for truggy as the B5
and most important the B5 sounds cooler on the track
