I have two cars, went with March on one, and speed & performance on the other. Both will do the job, Reality is.. The March was/ is far superior as far as keeping the show polish, no comparison, only draw back with the March set up, at least on the compact SBC setup is very difficult to do repairs in the field, but that is me and not you! Speed & performance same set up, well.. very easy to work on just basic.. you know 1/2" 9/16th what ever.. draw back in my case, was S&p customer support, I do not wish to put one down, but in my case it is what it is.I have had to repolish S&P twice, no way will I do it again!