I'm looking for a recommendation of swimming fins to use in pool workouts. I currently use the blue zoomers, but I'm looking for something that's a little "easier." I barely move when I kick on my own (inflexible ankles) so it's hard to do certain balance drills without fins. Yes, I know I need to improve my kicking, but in the near term, I think fins will enable me to work on other parts of my stroke, too. I like my zoomers, but they're a real workout for my legs and don't allow me to focus fully on the mid/front part of my body. I'm looking for something to give me a little nudge yet allow me to focus my attention/energies on things like hip rotation, narrow shoulders.

Any ideas would be greatly appreciated.