I could not agree more with this post...
I sometimes use the "slow, deep kick" that Seaweed Doc described, but mostly I use a slow modified frog kick. (Modified because my legs are not bent 90 at the knee as they would be underwater).
But anyways, I find that, with fins, both kicks allow me to leisurely cruise around with very little effort, saving energy for my next dive. Also, with only 2 strong kicks I can zoom right up to my girlfriend to see what she's pointing at or get her attention for some other reason.
Give it a try before changing your gear, then make the call. Good luck!
Interesting that you mention the frog kick. I got a new pair of fins for travel that are really light. They float. They make it a lot tougher to do a deep kick on the surface, so I was doing a lot of frog-kicking when I was snorkeling on Maui in August ....