Split fins: why not DIR?

[Punky]

I have not as yet bought a pair of split fins but would like to relate my experience with them.
My brother, his friend, and I were diving the Madera. On the surface swim back to shore they swam away from me in their splits like I was just floating there. My brother saw me and came back to lend a helping fin. (helped tow me :-[)
Since then I have been researching splits on Rodales Scuba Diving site and other places including opinions here.
According to the Rodale article, testers had the sensation of
of not getting anywhere that Jon mentioned, but test results showed they achieved greater speeds and were able maintain
those speeds longer than with blades.
Check out their articles and reviews at
scubadiving.com
Go to Gear reviews in the grey area at the top and click on fins.
Granted they are expensive and that is mostly what is stopping me from just buying them. I am hoping that like most new technology prices will come down evenually.