I know a lot of people will disagree but I would recommend the Force Fins.
I've been working on liveaboards for 7 years and these fins are great!
Light and short for travel, a bit bent upwards so you can actually walk around on the boat wearing them and the bungy was changed after approximately 6 years working which I consider pretty good.
I've been comparing SAC rates wearing doubles and a stage and mine was lower with these than with the Jet Fins and I kept a higher speed with the FF.
Now for the kick, I basically only do frog kicks with these and its a dream.
For full force and high speed flutter is better but normal swimming is better frogging around.
I find them great for helicopter turns and reversing is also real easy.
I've tried many fins but after a day evaluating I always go back to the Force Fins.
And don't forget they look pretty cool to.
They take some getting used to and I have only met a few other divers sharing my opinion but I will stick with these.