I don't mean to be totally dismissive of the original post but asking which buggy is best [regardless of surface] is sort of a dumb question which has been asked over and over. The cars from all the major brands are all so good now that I'd be confident in saying that it comes down to setup. The best buggy is the one with the best setup and best choice of tires. As mentioned by other posters, consider what your local shop supports and what local guys seem to run most. That should give you a safe place to start.