Well I prefer the Hellcat over the Epee for two reasons. First, the Hellcat, like all WC3/4 ships, has six missiles that you can customize, compared to the 2HS/2DF missiles on the Epee (I thnk the Epee should have 2IR/2HS instead, really). The second reason is that the Epee has such thin armor that fighting in it consists primarily of dodging enemy fire, because three hits is enough to kill you. If the Epee had armor as heavy as that on the Ferret, (which is to say, about 50% thicker), it might become livable, but as it is, if you're hit, you're dead.
Actually, I would prefer the Arrow over either of them, since it has autoslide. ^_-