When the Novas came out most of the people I dive with raved about them and the white ones looked as though they were designed for the Star Wars' stormtroopers scuba detachment; but I was left a bit disappointed when I tried them out and one of the reasons was the lack of accelaration to which the OP refers. However, shortly thereafter, I tried the Nova Gorillas - which are the stiffer version of the standard Seawing. Unfortunately they are not available in Stormtrooper white, but they really rock and I have switched to them. Most of my sea diving is in strong currents & surge, while inland there is quite a lot of surface & underwater swimming; the gorillas work in both environments and offer excellent accelaration, neutral bouyancy and I don't struggle at all maintaining a steady speed over long distances.
I've only tried the Jetfins once, but I far prefer the Seawing Nova Gorillas for overall comfort and general 'usability'. Before going the Jetfin or Trident route, give the Gorilla a bash