Forte speakers are all good , in any version , but the II has a better mids horn , and so are the Heresy 12 inch woofer driven ------Forte has more bass , the Heresy better vocals -----and most owners would have modified them somewhat , the only thing to consider is recapping the crossover , the rest is not that important , some people go for Titanium diaphragms for the mids , but overall the changes are minimal -