to put in what? go with a .21 for fuel economy IMO and rule the go-techs and piccos and werks out........ JMO

get an RB. I have a ws7III and It rocks, easy to tune, and it dont flame so far. Im getting another RB soon just to have as a backup(I think a c6)

my choices would be
RB ws7III, c6 or even the new seven, depending on what the application is for...truggy im assuming, then get a c6bb.