The new Vinberg monitors, will be a huge step up from Pulsars..HUGEThat is impossible. The only huge step up will be the price. The josephs use a well braced box. You cant get much more rigid than that and the audible difference would be negligible. The drivers used are pretty much among the best. Theres not much you can improve on the crossover either its obviously been optimised.
The only improvement you could do on a pulsar is if it was offered for a fraction of the cost.